Knowledge (XXG)

Pentagonal number

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1350: 4192: 4501: 3990: 27: 1178: 1173: 1168: 1163: 1157: 1152: 1147: 1142: 1137: 1131: 1126: 1121: 1116: 1111: 1106: 983: 978: 973: 967: 962: 957: 952: 880: 875: 1100: 1095: 1090: 1085: 1080: 1075: 1070: 1064: 1059: 1054: 1049: 1044: 1039: 1033: 1028: 1023: 1018: 1013: 1007: 1002: 997: 992: 946: 941: 936: 931: 926: 920: 915: 910: 905: 899: 894: 889: 869: 864: 859: 853: 848: 839: 576:
0, 1, 2, 5, 7, 12, 15, 22, 26, 35, 40, 51, 57, 70, 77, 92, 100, 117, 126, 145, 155, 176, 187, 210, 222, 247, 260, 287, 301, 330, 345, 376, 392, 425, 442, 477, 495, 532, 551, 590, 610, 651, 672, 715, 737, 782, 805, 852, 876, 925, 950, 1001, 1027, 1080, 1107, 1162, 1190, 1247, 1276, 1335... (sequence
1346:≥ 1). This division of centered hexagonal arrays gives generalized pentagonal numbers as trapezoidal arrays, which may be interpreted as Ferrers diagrams for their partition. In this way they can be used to prove the pentagonal number theorem referenced above. 1337: 809:. When the array corresponding to a centered hexagonal number is divided between its middle row and an adjacent row, it appears as the sum of two generalized pentagonal numbers, with the larger piece being a pentagonal number proper: 202: 560: 81:. For instance, the third one is formed from outlines comprising 1, 5 and 10 dots, but the 1, and 3 of the 5, coincide with 3 of the 10 – leaving 12 distinct dots, 10 in the form of a pentagon, and 2 inside. 395: 1439: 795: 1527: 4383: 1610: 2092: 269:, 1080, 1162, 1247, 1335, 1426, 1520, 1617, 1717, 1820, 1926, 2035, 2147, 2262, 2380, 2501, 2625, 2752, 2882, 3015, 3151, 3290, 3432, 3577, 3725, 3876, 4030, 4187... (sequence 1626:
0, 1, 9801, 94109401, 903638458801, 8676736387298001, 83314021887196947001, 799981229484128697805801, 7681419682192581869134354401, 73756990988431941623299373152801... (
4373: 1194: 697: 638: 4026: 668: 4466: 4307: 1727: 584: 276: 2085: 1532:
The mathematical properties of pentagonal numbers ensure that these tests are sufficient for proving or disproving the pentagonality of a number.
96: 4317: 4312: 430: 2892: 2078: 4481: 4072: 4019: 2887: 2902: 2882: 605:
The number of dots inside the outermost pentagon of a pattern forming a pentagonal number is itself a generalized pentagonal number.
4461: 4363: 4353: 4471: 3595: 3175: 2897: 1720: 3681: 286:
th pentagonal number is the sum of n integers starting from n (i.e. from n to 2n-1). The following relationships also hold:
292: 4476: 4378: 4012: 2997: 4504: 3347: 2666: 2459: 1905: 3382: 3352: 3027: 3017: 1387: 704: 4486: 3523: 2937: 2671: 2651: 1910: 1890: 641: 3213: 4358: 4348: 4338: 3377: 4368: 3472: 3095: 2852: 2661: 2643: 2537: 2527: 2517: 1900: 1882: 1781: 1771: 1761: 1484: 1342:
where both terms on the right are generalized pentagonal numbers and the first term is a pentagonal number proper (
20: 3357: 4525: 3600: 3145: 2766: 2552: 2547: 2542: 2532: 2509: 2005: 1796: 1791: 1786: 1776: 1753: 1713: 806: 599: 1478:
For non-generalized pentagonal numbers, in addition to the perfect square test, it is also required to check if
2585: 2842: 4453: 4275: 3711: 3676: 3462: 3372: 3246: 3221: 3130: 3120: 2732: 2714: 2634: 1971: 1948: 1873: 4115: 4062: 3971: 3241: 3115: 2746: 2522: 2302: 2229: 1985: 1766: 4322: 4067: 3226: 3080: 3007: 2162: 2040: 1554: 3935: 3575: 1666: 4433: 4270: 4039: 3868: 3762: 3726: 3467: 3190: 3170: 2987: 2656: 2444: 2416: 1895: 77:
of regular pentagons with sides up to n dots, when the pentagons are overlaid so that they share one
54:, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not 4413: 4280: 3590: 3454: 3449: 3417: 3180: 3155: 3150: 3125: 3055: 3051: 2982: 2872: 2704: 2500: 2469: 1938: 1744: 1353: 55: 3989: 1349: 4254: 4239: 4211: 4191: 4130: 3993: 3747: 3742: 3656: 3630: 3528: 3507: 3279: 3160: 3110: 3032: 3002: 2942: 2709: 2689: 2620: 2333: 1966: 1943: 1859: 4343: 2877: 1332:{\displaystyle 3n(n-1)+1={\tfrac {1}{2}}n(3n-1)+{\tfrac {1}{2}}(1-n){\bigl (}3(1-n)-1{\bigr )}} 4443: 4244: 4216: 4170: 4140: 4125: 3887: 3832: 3686: 3661: 3635: 3412: 3090: 3085: 3012: 2992: 2977: 2699: 2681: 2600: 2575: 2353: 2338: 1933: 1920: 1839: 1819: 1648: 1361: 595: 413: 78: 43: 4428: 4249: 4175: 4165: 4145: 4047: 3923: 3716: 3302: 3274: 3264: 3256: 3140: 3105: 3100: 3067: 2761: 2724: 2615: 2610: 2605: 2595: 2567: 2454: 2406: 2401: 2358: 2297: 2000: 1958: 1854: 1849: 1844: 1834: 1811: 1643: 1678: 675: 616: 4206: 4135: 3899: 3788: 3721: 3647: 3570: 3544: 3362: 3075: 2932: 2867: 2837: 2827: 2822: 2488: 2396: 2343: 2187: 2127: 1736: 1541: 39: 647: 4438: 4423: 4418: 4097: 4082: 3904: 3772: 3757: 3621: 3585: 3560: 3436: 3407: 3392: 3269: 3165: 3135: 2862: 2817: 2694: 2292: 2287: 2282: 2254: 2239: 2152: 2137: 2115: 2102: 1928: 1453: 4519: 4403: 4077: 3827: 3811: 3752: 3706: 3402: 3387: 3297: 3022: 2580: 2449: 2411: 2368: 2249: 2234: 2224: 2182: 2172: 2147: 2050: 1824: 266: 47: 573:
taking values in the sequence 0, 1, −1, 2, −2, 3, −3, 4..., producing the sequence:
4408: 4150: 4092: 3863: 3852: 3767: 3605: 3580: 3497: 3397: 3367: 3342: 3326: 3231: 3198: 2947: 2921: 2832: 2771: 2348: 2244: 2177: 2157: 2132: 2055: 2010: 262: 258: 254: 250: 246: 1620:
A square pentagonal number is a pentagonal number that is also a perfect square.
4155: 4102: 3822: 3697: 3502: 2966: 2857: 2812: 2807: 2557: 2464: 2363: 2192: 2167: 2142: 2045: 1801: 242: 238: 234: 230: 226: 222: 26: 3959: 3940: 3236: 2847: 1177: 1172: 1167: 1162: 1156: 1151: 1146: 1141: 1136: 1130: 1125: 1120: 1115: 1110: 1105: 982: 977: 972: 966: 961: 956: 951: 879: 874: 218: 214: 2070: 1381:, to test whether it is a (non-generalized) pentagonal number we can compute 1099: 1094: 1089: 1084: 1079: 1074: 1069: 1063: 1058: 1053: 1048: 1043: 1038: 1032: 1027: 1022: 1017: 1012: 1006: 1001: 996: 991: 945: 940: 935: 930: 925: 919: 914: 909: 904: 898: 893: 888: 868: 863: 858: 852: 847: 838: 4087: 3565: 3492: 3484: 3289: 3203: 2321: 2025: 197:{\displaystyle p_{n}={\frac {3n^{2}-n}{2}}={\binom {n}{1}}+3{\binom {n}{2}}} 4035: 3666: 51: 4004: 3671: 3330: 1698:
Leonhard Euler: On the remarkable properties of the pentagonal numbers
1467:
For generalized pentagonal numbers, it is sufficient to just check if
1697: 1705: 555:{\displaystyle p_{n}=T_{n-1}+n^{2}=T_{n}+2T_{n-1}=T_{2n-1}-T_{n-1}} 1348: 591: 400:
Pentagonal numbers are closely related to triangular numbers. The
25: 1627: 4008: 3957: 3921: 3885: 3849: 3809: 3434: 3323: 3049: 2964: 2919: 2796: 2486: 2433: 2385: 2319: 2271: 2209: 2113: 2074: 1709: 699:
is the sum of the first n natural numbers congruent to 1 mod 3.
265:, 287, 330, 376, 425, 477, 532, 590, 651, 715, 782, 852, 925, 801:
Generalized pentagonal numbers and centered hexagonal numbers
1631: 579: 271: 30:
A visual representation of the first six pentagonal numbers
1667:
How do you determine if a number N is a Pentagonal Number?
1265: 1229: 805:
Generalized pentagonal numbers are closely related to
4384:
1/2 + 1/3 + 1/5 + 1/7 + 1/11 + ⋯ (inverses of primes)
4374:
1 − 1 + 2 − 6 + 24 − 120 + ⋯ (alternating factorials)
1557: 1487: 1390: 1197: 707: 678: 650: 619: 433: 390:{\displaystyle p_{n}=p_{n-1}+3n-2=2p_{n-1}-p_{n-2}+3} 295: 99: 569:
are obtained from the formula given above, but with
4452: 4396: 4331: 4300: 4293: 4263: 4232: 4225: 4199: 4111: 4055: 4046: 3781: 3735: 3695: 3646: 3620: 3553: 3537: 3516: 3483: 3448: 3288: 3255: 3212: 3189: 3066: 2754: 2745: 2723: 2680: 2642: 2633: 2566: 2508: 2499: 2033: 2023: 1993: 1984: 1957: 1919: 1881: 1872: 1810: 1752: 1743: 1604: 1521: 1433: 1360:th pentagonal number can be decomposed into three 1331: 789: 691: 662: 632: 554: 389: 196: 1434:{\displaystyle n={\frac {{\sqrt {24x+1}}+1}{6}}.} 790:{\displaystyle p_{8n}-p_{8n-1}=p_{2n+2}-p_{2n-2}} 211:≥ 1. The first few pentagonal numbers are: 188: 175: 160: 147: 590:Generalized pentagonal numbers are important to 4020: 2086: 1721: 1522:{\displaystyle {\sqrt {24x+1}}\equiv 5\mod 6} 1324: 1293: 8: 4467:Hypergeometric function of a matrix argument 835: 73:dots in a pattern of dots consisting of the 4323:1 + 1/2 + 1/3 + ... (Riemann zeta function) 4297: 4229: 4052: 4027: 4013: 4005: 3954: 3918: 3882: 3846: 3806: 3480: 3445: 3431: 3320: 3063: 3046: 2961: 2916: 2793: 2751: 2639: 2505: 2496: 2483: 2430: 2387:Possessing a specific set of other numbers 2382: 2316: 2268: 2206: 2110: 2093: 2079: 2071: 2030: 1990: 1878: 1749: 1728: 1714: 1706: 4379:1 + 1/2 + 1/3 + 1/4 + ⋯ (harmonic series) 1581: 1562: 1556: 1515: 1514: 1488: 1486: 1400: 1397: 1389: 1323: 1322: 1292: 1291: 1264: 1228: 1196: 772: 750: 728: 712: 706: 683: 677: 649: 624: 618: 540: 518: 499: 483: 470: 451: 438: 432: 404:th pentagonal number is one third of the 369: 350: 313: 300: 294: 187: 174: 172: 159: 146: 144: 123: 113: 104: 98: 1659: 670:into n parts that don't include 2 or 3. 640:for n>0 is the number of different 7: 4344:1 − 1 + 1 − 1 + ⋯ (Grandi's series) 1605:{\displaystyle p_{n+1}-p_{n}=3n+1} 179: 151: 14: 4462:Generalized hypergeometric series 4500: 4499: 4472:Lauricella hypergeometric series 4190: 3988: 3596:Perfect digit-to-digit invariant 1176: 1171: 1166: 1161: 1155: 1150: 1145: 1140: 1135: 1129: 1124: 1119: 1114: 1109: 1104: 1098: 1093: 1088: 1083: 1078: 1073: 1068: 1062: 1057: 1052: 1047: 1042: 1037: 1031: 1026: 1021: 1016: 1011: 1005: 1000: 995: 990: 981: 976: 971: 965: 960: 955: 950: 944: 939: 934: 929: 924: 918: 913: 908: 903: 897: 892: 887: 878: 873: 867: 862: 857: 851: 846: 837: 4482:Riemann's differential equation 1510: 1313: 1301: 1288: 1276: 1258: 1243: 1216: 1204: 567:Generalized pentagonal numbers 1: 4477:Modular hypergeometric series 4318:1/4 + 1/16 + 1/64 + 1/256 + ⋯ 2435:Expressible via specific sums 1906:Centered dodecahedral numbers 1448:is pentagonal if and only if 1911:Centered icosahedral numbers 1891:Centered tetrahedral numbers 1373:Tests for pentagonal numbers 42:that extends the concept of 4487:Theta hypergeometric series 3524:Multiplicative digital root 1901:Centered octahedral numbers 1782:Centered heptagonal numbers 1772:Centered pentagonal numbers 1762:Centered triangular numbers 4542: 4369:Infinite arithmetic series 4313:1/2 + 1/4 + 1/8 + 1/16 + ⋯ 4308:1/2 − 1/4 + 1/8 − 1/16 + ⋯ 2006:Squared triangular numbers 1797:Centered decagonal numbers 1792:Centered nonagonal numbers 1787:Centered octagonal numbers 1777:Centered hexagonal numbers 807:centered hexagonal numbers 21:centered pentagonal number 18: 4495: 4188: 3984: 3967: 3953: 3931: 3917: 3895: 3881: 3859: 3845: 3818: 3805: 3601:Perfect digital invariant 3444: 3430: 3338: 3319: 3176:Superior highly composite 3062: 3045: 2973: 2960: 2928: 2915: 2803: 2792: 2495: 2482: 2440: 2429: 2392: 2381: 2329: 2315: 2278: 2267: 2220: 2205: 2123: 2109: 1685:--A Wolfram Web Resource. 1616:Square pentagonal numbers 1548:th pentagonal number is: 1377:Given a positive integer 600:pentagonal number theorem 90:is given by the formula: 3214:Euler's totient function 2998:Euler–Jacobi pseudoprime 2273:Other polynomial numbers 1972:Square pyramidal numbers 1949:Stella octangula numbers 1679:Pentagonal Square Number 56:rotationally symmetrical 19:Not to be confused with 4200:Properties of sequences 3028:Somer–Lucas pseudoprime 3018:Lucas–Carmichael number 2853:Lazy caterer's sequence 1767:Centered square numbers 4063:Arithmetic progression 2903:Wedderburn–Etherington 2303:Lucky numbers of Euler 1606: 1523: 1464:th pentagonal number. 1435: 1369: 1333: 791: 693: 664: 634: 598:, as expressed in his 556: 424:th triangular number: 416:. In addition, where T 391: 198: 31: 4454:Hypergeometric series 4068:Geometric progression 3191:Prime omega functions 3008:Frobenius pseudoprime 2798:Combinatorial numbers 2667:Centered dodecahedral 2460:Primary pseudoperfect 1896:Centered cube numbers 1607: 1524: 1475:is a perfect square. 1436: 1352: 1334: 792: 694: 692:{\displaystyle p_{n}} 665: 635: 633:{\displaystyle p_{n}} 557: 392: 199: 62:th pentagonal number 29: 4434:Trigonometric series 4226:Properties of series 4073:Harmonic progression 3650:-composition related 3450:Arithmetic functions 3052:Arithmetic functions 2988:Elliptic pseudoprime 2672:Centered icosahedral 2652:Centered tetrahedral 1939:Dodecahedral numbers 1677:Weisstein, Eric W. " 1555: 1485: 1388: 1195: 705: 676: 648: 617: 431: 293: 97: 4414:Formal power series 3576:Kaprekar's constant 3096:Colossally abundant 2983:Catalan pseudoprime 2883:Schröder–Hipparchus 2662:Centered octahedral 2538:Centered heptagonal 2528:Centered pentagonal 2518:Centered triangular 2118:and related numbers 2056:8-hypercube numbers 2051:7-hypercube numbers 2046:6-hypercube numbers 2041:5-hypercube numbers 2011:Tesseractic numbers 1967:Tetrahedral numbers 1944:Icosahedral numbers 1860:Dodecagonal numbers 1623:The first few are: 1354:Proof without words 663:{\displaystyle n+8} 4212:Monotonic function 4131:Fibonacci sequence 3994:Mathematics portal 3936:Aronson's sequence 3682:Smarandache–Wellin 3439:-dependent numbers 3146:Primitive abundant 3033:Strong pseudoprime 3023:Perrin pseudoprime 3003:Fermat pseudoprime 2943:Wolstenholme prime 2767:Squared triangular 2553:Centered decagonal 2548:Centered nonagonal 2543:Centered octagonal 2533:Centered hexagonal 1934:Octahedral numbers 1840:Heptagonal numbers 1830:Pentagonal numbers 1820:Triangular numbers 1602: 1519: 1431: 1370: 1362:triangular numbers 1329: 1274: 1238: 787: 689: 660: 630: 596:integer partitions 552: 387: 194: 32: 4513: 4512: 4444:Generating series 4392: 4391: 4364:1 − 2 + 4 − 8 + ⋯ 4359:1 + 2 + 4 + 8 + ⋯ 4354:1 − 2 + 3 − 4 + ⋯ 4349:1 + 2 + 3 + 4 + ⋯ 4339:1 + 1 + 1 + 1 + ⋯ 4289: 4288: 4217:Periodic sequence 4186: 4185: 4171:Triangular number 4161:Pentagonal number 4141:Heptagonal number 4126:Complete sequence 4048:Integer sequences 4002: 4001: 3980: 3979: 3949: 3948: 3913: 3912: 3877: 3876: 3841: 3840: 3801: 3800: 3797: 3796: 3616: 3615: 3426: 3425: 3315: 3314: 3311: 3310: 3257:Aliquot sequences 3068:Divisor functions 3041: 3040: 3013:Lucas pseudoprime 2993:Euler pseudoprime 2978:Carmichael number 2956: 2955: 2911: 2910: 2788: 2787: 2784: 2783: 2780: 2779: 2741: 2740: 2629: 2628: 2586:Square triangular 2478: 2477: 2425: 2424: 2377: 2376: 2311: 2310: 2263: 2262: 2201: 2200: 2068: 2067: 2064: 2063: 2019: 2018: 2001:Pentatope numbers 1980: 1979: 1868: 1867: 1855:Decagonal numbers 1850:Nonagonal numbers 1845:Octagonal numbers 1835:Hexagonal numbers 1649:Triangular number 1502: 1426: 1414: 1273: 1237: 1184: 1183: 414:triangular number 186: 158: 139: 69:is the number of 36:pentagonal number 4533: 4526:Figurate numbers 4503: 4502: 4429:Dirichlet series 4298: 4230: 4194: 4166:Polygonal number 4146:Hexagonal number 4119: 4053: 4029: 4022: 4015: 4006: 3992: 3955: 3924:Natural language 3919: 3883: 3851:Generated via a 3847: 3807: 3712:Digit-reassembly 3677:Self-descriptive 3481: 3446: 3432: 3383:Lucas–Carmichael 3373:Harmonic divisor 3321: 3247:Sparsely totient 3222:Highly cototient 3131:Multiply perfect 3121:Highly composite 3064: 3047: 2962: 2917: 2898:Telephone number 2794: 2752: 2733:Square pyramidal 2715:Stella octangula 2640: 2506: 2497: 2489:Figurate numbers 2484: 2431: 2383: 2317: 2269: 2207: 2111: 2095: 2088: 2081: 2072: 2031: 1991: 1879: 1750: 1737:Figurate numbers 1730: 1723: 1716: 1707: 1686: 1675: 1669: 1664: 1644:Hexagonal number 1611: 1609: 1608: 1603: 1586: 1585: 1573: 1572: 1528: 1526: 1525: 1520: 1503: 1489: 1474: 1440: 1438: 1437: 1432: 1427: 1422: 1415: 1401: 1398: 1338: 1336: 1335: 1330: 1328: 1327: 1297: 1296: 1275: 1266: 1239: 1230: 1180: 1175: 1170: 1165: 1159: 1154: 1149: 1144: 1139: 1133: 1128: 1123: 1118: 1113: 1108: 1102: 1097: 1092: 1087: 1082: 1077: 1072: 1066: 1061: 1056: 1051: 1046: 1041: 1035: 1030: 1025: 1020: 1015: 1009: 1004: 999: 994: 985: 980: 975: 969: 964: 959: 954: 948: 943: 938: 933: 928: 922: 917: 912: 907: 901: 896: 891: 882: 877: 871: 866: 861: 855: 850: 841: 814: 813: 796: 794: 793: 788: 786: 785: 764: 763: 742: 741: 720: 719: 698: 696: 695: 690: 688: 687: 669: 667: 666: 661: 639: 637: 636: 631: 629: 628: 609:Other properties 582: 561: 559: 558: 553: 551: 550: 532: 531: 510: 509: 488: 487: 475: 474: 462: 461: 443: 442: 411: 396: 394: 393: 388: 380: 379: 361: 360: 324: 323: 305: 304: 274: 203: 201: 200: 195: 193: 192: 191: 178: 165: 164: 163: 150: 140: 135: 128: 127: 114: 109: 108: 4541: 4540: 4536: 4535: 4534: 4532: 4531: 4530: 4516: 4515: 4514: 4509: 4491: 4448: 4397:Kinds of series 4388: 4327: 4294:Explicit series 4285: 4259: 4221: 4207:Cauchy sequence 4195: 4182: 4136:Figurate number 4113: 4107: 4098:Powers of three 4042: 4033: 4003: 3998: 3976: 3972:Strobogrammatic 3963: 3945: 3927: 3909: 3891: 3873: 3855: 3837: 3814: 3793: 3777: 3736:Divisor-related 3731: 3691: 3642: 3612: 3549: 3533: 3512: 3479: 3452: 3440: 3422: 3334: 3333:related numbers 3307: 3284: 3251: 3242:Perfect totient 3208: 3185: 3116:Highly abundant 3058: 3037: 2969: 2952: 2924: 2907: 2893:Stirling second 2799: 2776: 2737: 2719: 2676: 2625: 2562: 2523:Centered square 2491: 2474: 2436: 2421: 2388: 2373: 2325: 2324:defined numbers 2307: 2274: 2259: 2230:Double Mersenne 2216: 2197: 2119: 2105: 2103:natural numbers 2099: 2069: 2060: 2015: 1976: 1953: 1915: 1864: 1806: 1739: 1734: 1703: 1694: 1692:Further reading 1689: 1676: 1672: 1665: 1661: 1657: 1640: 1618: 1577: 1558: 1553: 1552: 1538: 1483: 1482: 1468: 1456:. In that case 1399: 1386: 1385: 1375: 1364:and the number 1193: 1192: 1160: 1134: 1103: 1067: 1036: 1010: 970: 949: 923: 902: 872: 856: 803: 768: 746: 724: 708: 703: 702: 679: 674: 673: 646: 645: 620: 615: 614: 611: 578: 565: 536: 514: 495: 479: 466: 447: 434: 429: 428: 419: 405: 365: 346: 309: 296: 291: 290: 270: 173: 145: 119: 115: 100: 95: 94: 89: 67: 40:figurate number 24: 17: 16:Figurate number 12: 11: 5: 4539: 4537: 4529: 4528: 4518: 4517: 4511: 4510: 4508: 4507: 4496: 4493: 4492: 4490: 4489: 4484: 4479: 4474: 4469: 4464: 4458: 4456: 4450: 4449: 4447: 4446: 4441: 4439:Fourier series 4436: 4431: 4426: 4424:Puiseux series 4421: 4419:Laurent series 4416: 4411: 4406: 4400: 4398: 4394: 4393: 4390: 4389: 4387: 4386: 4381: 4376: 4371: 4366: 4361: 4356: 4351: 4346: 4341: 4335: 4333: 4329: 4328: 4326: 4325: 4320: 4315: 4310: 4304: 4302: 4295: 4291: 4290: 4287: 4286: 4284: 4283: 4278: 4273: 4267: 4265: 4261: 4260: 4258: 4257: 4252: 4247: 4242: 4236: 4234: 4227: 4223: 4222: 4220: 4219: 4214: 4209: 4203: 4201: 4197: 4196: 4189: 4187: 4184: 4183: 4181: 4180: 4179: 4178: 4168: 4163: 4158: 4153: 4148: 4143: 4138: 4133: 4128: 4122: 4120: 4109: 4108: 4106: 4105: 4100: 4095: 4090: 4085: 4080: 4075: 4070: 4065: 4059: 4057: 4050: 4044: 4043: 4034: 4032: 4031: 4024: 4017: 4009: 4000: 3999: 3997: 3996: 3985: 3982: 3981: 3978: 3977: 3975: 3974: 3968: 3965: 3964: 3958: 3951: 3950: 3947: 3946: 3944: 3943: 3938: 3932: 3929: 3928: 3922: 3915: 3914: 3911: 3910: 3908: 3907: 3905:Sorting number 3902: 3900:Pancake number 3896: 3893: 3892: 3886: 3879: 3878: 3875: 3874: 3872: 3871: 3866: 3860: 3857: 3856: 3850: 3843: 3842: 3839: 3838: 3836: 3835: 3830: 3825: 3819: 3816: 3815: 3812:Binary numbers 3810: 3803: 3802: 3799: 3798: 3795: 3794: 3792: 3791: 3785: 3783: 3779: 3778: 3776: 3775: 3770: 3765: 3760: 3755: 3750: 3745: 3739: 3737: 3733: 3732: 3730: 3729: 3724: 3719: 3714: 3709: 3703: 3701: 3693: 3692: 3690: 3689: 3684: 3679: 3674: 3669: 3664: 3659: 3653: 3651: 3644: 3643: 3641: 3640: 3639: 3638: 3627: 3625: 3622:P-adic numbers 3618: 3617: 3614: 3613: 3611: 3610: 3609: 3608: 3598: 3593: 3588: 3583: 3578: 3573: 3568: 3563: 3557: 3555: 3551: 3550: 3548: 3547: 3541: 3539: 3538:Coding-related 3535: 3534: 3532: 3531: 3526: 3520: 3518: 3514: 3513: 3511: 3510: 3505: 3500: 3495: 3489: 3487: 3478: 3477: 3476: 3475: 3473:Multiplicative 3470: 3459: 3457: 3442: 3441: 3437:Numeral system 3435: 3428: 3427: 3424: 3423: 3421: 3420: 3415: 3410: 3405: 3400: 3395: 3390: 3385: 3380: 3375: 3370: 3365: 3360: 3355: 3350: 3345: 3339: 3336: 3335: 3324: 3317: 3316: 3313: 3312: 3309: 3308: 3306: 3305: 3300: 3294: 3292: 3286: 3285: 3283: 3282: 3277: 3272: 3267: 3261: 3259: 3253: 3252: 3250: 3249: 3244: 3239: 3234: 3229: 3227:Highly totient 3224: 3218: 3216: 3210: 3209: 3207: 3206: 3201: 3195: 3193: 3187: 3186: 3184: 3183: 3178: 3173: 3168: 3163: 3158: 3153: 3148: 3143: 3138: 3133: 3128: 3123: 3118: 3113: 3108: 3103: 3098: 3093: 3088: 3083: 3081:Almost perfect 3078: 3072: 3070: 3060: 3059: 3050: 3043: 3042: 3039: 3038: 3036: 3035: 3030: 3025: 3020: 3015: 3010: 3005: 3000: 2995: 2990: 2985: 2980: 2974: 2971: 2970: 2965: 2958: 2957: 2954: 2953: 2951: 2950: 2945: 2940: 2935: 2929: 2926: 2925: 2920: 2913: 2912: 2909: 2908: 2906: 2905: 2900: 2895: 2890: 2888:Stirling first 2885: 2880: 2875: 2870: 2865: 2860: 2855: 2850: 2845: 2840: 2835: 2830: 2825: 2820: 2815: 2810: 2804: 2801: 2800: 2797: 2790: 2789: 2786: 2785: 2782: 2781: 2778: 2777: 2775: 2774: 2769: 2764: 2758: 2756: 2749: 2743: 2742: 2739: 2738: 2736: 2735: 2729: 2727: 2721: 2720: 2718: 2717: 2712: 2707: 2702: 2697: 2692: 2686: 2684: 2678: 2677: 2675: 2674: 2669: 2664: 2659: 2654: 2648: 2646: 2637: 2631: 2630: 2627: 2626: 2624: 2623: 2618: 2613: 2608: 2603: 2598: 2593: 2588: 2583: 2578: 2572: 2570: 2564: 2563: 2561: 2560: 2555: 2550: 2545: 2540: 2535: 2530: 2525: 2520: 2514: 2512: 2503: 2493: 2492: 2487: 2480: 2479: 2476: 2475: 2473: 2472: 2467: 2462: 2457: 2452: 2447: 2441: 2438: 2437: 2434: 2427: 2426: 2423: 2422: 2420: 2419: 2414: 2409: 2404: 2399: 2393: 2390: 2389: 2386: 2379: 2378: 2375: 2374: 2372: 2371: 2366: 2361: 2356: 2351: 2346: 2341: 2336: 2330: 2327: 2326: 2320: 2313: 2312: 2309: 2308: 2306: 2305: 2300: 2295: 2290: 2285: 2279: 2276: 2275: 2272: 2265: 2264: 2261: 2260: 2258: 2257: 2252: 2247: 2242: 2237: 2232: 2227: 2221: 2218: 2217: 2210: 2203: 2202: 2199: 2198: 2196: 2195: 2190: 2185: 2180: 2175: 2170: 2165: 2160: 2155: 2150: 2145: 2140: 2135: 2130: 2124: 2121: 2120: 2114: 2107: 2106: 2100: 2098: 2097: 2090: 2083: 2075: 2066: 2065: 2062: 2061: 2059: 2058: 2053: 2048: 2043: 2037: 2035: 2028: 2021: 2020: 2017: 2016: 2014: 2013: 2008: 2003: 1997: 1995: 1988: 1982: 1981: 1978: 1977: 1975: 1974: 1969: 1963: 1961: 1955: 1954: 1952: 1951: 1946: 1941: 1936: 1931: 1925: 1923: 1917: 1916: 1914: 1913: 1908: 1903: 1898: 1893: 1887: 1885: 1876: 1870: 1869: 1866: 1865: 1863: 1862: 1857: 1852: 1847: 1842: 1837: 1832: 1827: 1825:Square numbers 1822: 1816: 1814: 1808: 1807: 1805: 1804: 1799: 1794: 1789: 1784: 1779: 1774: 1769: 1764: 1758: 1756: 1747: 1741: 1740: 1735: 1733: 1732: 1725: 1718: 1710: 1701: 1700: 1693: 1690: 1688: 1687: 1670: 1658: 1656: 1653: 1652: 1651: 1646: 1639: 1636: 1617: 1614: 1613: 1612: 1601: 1598: 1595: 1592: 1589: 1584: 1580: 1576: 1571: 1568: 1565: 1561: 1537: 1534: 1530: 1529: 1518: 1513: 1509: 1506: 1501: 1498: 1495: 1492: 1454:natural number 1442: 1441: 1430: 1425: 1421: 1418: 1413: 1410: 1407: 1404: 1396: 1393: 1374: 1371: 1340: 1339: 1326: 1321: 1318: 1315: 1312: 1309: 1306: 1303: 1300: 1295: 1290: 1287: 1284: 1281: 1278: 1272: 1269: 1263: 1260: 1257: 1254: 1251: 1248: 1245: 1242: 1236: 1233: 1227: 1224: 1221: 1218: 1215: 1212: 1209: 1206: 1203: 1200: 1186: 1185: 1182: 1181: 988: 986: 885: 883: 844: 842: 834: 833: 830: 828: 825: 823: 820: 818: 802: 799: 798: 797: 784: 781: 778: 775: 771: 767: 762: 759: 756: 753: 749: 745: 740: 737: 734: 731: 727: 723: 718: 715: 711: 700: 686: 682: 671: 659: 656: 653: 627: 623: 610: 607: 563: 562: 549: 546: 543: 539: 535: 530: 527: 524: 521: 517: 513: 508: 505: 502: 498: 494: 491: 486: 482: 478: 473: 469: 465: 460: 457: 454: 450: 446: 441: 437: 417: 398: 397: 386: 383: 378: 375: 372: 368: 364: 359: 356: 353: 349: 345: 342: 339: 336: 333: 330: 327: 322: 319: 316: 312: 308: 303: 299: 205: 204: 190: 185: 182: 177: 171: 168: 162: 157: 154: 149: 143: 138: 134: 131: 126: 122: 118: 112: 107: 103: 87: 65: 48:square numbers 15: 13: 10: 9: 6: 4: 3: 2: 4538: 4527: 4524: 4523: 4521: 4506: 4498: 4497: 4494: 4488: 4485: 4483: 4480: 4478: 4475: 4473: 4470: 4468: 4465: 4463: 4460: 4459: 4457: 4455: 4451: 4445: 4442: 4440: 4437: 4435: 4432: 4430: 4427: 4425: 4422: 4420: 4417: 4415: 4412: 4410: 4407: 4405: 4404:Taylor series 4402: 4401: 4399: 4395: 4385: 4382: 4380: 4377: 4375: 4372: 4370: 4367: 4365: 4362: 4360: 4357: 4355: 4352: 4350: 4347: 4345: 4342: 4340: 4337: 4336: 4334: 4330: 4324: 4321: 4319: 4316: 4314: 4311: 4309: 4306: 4305: 4303: 4299: 4296: 4292: 4282: 4279: 4277: 4274: 4272: 4269: 4268: 4266: 4262: 4256: 4253: 4251: 4248: 4246: 4243: 4241: 4238: 4237: 4235: 4231: 4228: 4224: 4218: 4215: 4213: 4210: 4208: 4205: 4204: 4202: 4198: 4193: 4177: 4174: 4173: 4172: 4169: 4167: 4164: 4162: 4159: 4157: 4154: 4152: 4149: 4147: 4144: 4142: 4139: 4137: 4134: 4132: 4129: 4127: 4124: 4123: 4121: 4117: 4110: 4104: 4101: 4099: 4096: 4094: 4093:Powers of two 4091: 4089: 4086: 4084: 4081: 4079: 4078:Square number 4076: 4074: 4071: 4069: 4066: 4064: 4061: 4060: 4058: 4054: 4051: 4049: 4045: 4041: 4037: 4030: 4025: 4023: 4018: 4016: 4011: 4010: 4007: 3995: 3991: 3987: 3986: 3983: 3973: 3970: 3969: 3966: 3961: 3956: 3952: 3942: 3939: 3937: 3934: 3933: 3930: 3925: 3920: 3916: 3906: 3903: 3901: 3898: 3897: 3894: 3889: 3884: 3880: 3870: 3867: 3865: 3862: 3861: 3858: 3854: 3848: 3844: 3834: 3831: 3829: 3826: 3824: 3821: 3820: 3817: 3813: 3808: 3804: 3790: 3787: 3786: 3784: 3780: 3774: 3771: 3769: 3766: 3764: 3763:Polydivisible 3761: 3759: 3756: 3754: 3751: 3749: 3746: 3744: 3741: 3740: 3738: 3734: 3728: 3725: 3723: 3720: 3718: 3715: 3713: 3710: 3708: 3705: 3704: 3702: 3699: 3694: 3688: 3685: 3683: 3680: 3678: 3675: 3673: 3670: 3668: 3665: 3663: 3660: 3658: 3655: 3654: 3652: 3649: 3645: 3637: 3634: 3633: 3632: 3629: 3628: 3626: 3623: 3619: 3607: 3604: 3603: 3602: 3599: 3597: 3594: 3592: 3589: 3587: 3584: 3582: 3579: 3577: 3574: 3572: 3569: 3567: 3564: 3562: 3559: 3558: 3556: 3552: 3546: 3543: 3542: 3540: 3536: 3530: 3527: 3525: 3522: 3521: 3519: 3517:Digit product 3515: 3509: 3506: 3504: 3501: 3499: 3496: 3494: 3491: 3490: 3488: 3486: 3482: 3474: 3471: 3469: 3466: 3465: 3464: 3461: 3460: 3458: 3456: 3451: 3447: 3443: 3438: 3433: 3429: 3419: 3416: 3414: 3411: 3409: 3406: 3404: 3401: 3399: 3396: 3394: 3391: 3389: 3386: 3384: 3381: 3379: 3376: 3374: 3371: 3369: 3366: 3364: 3361: 3359: 3356: 3354: 3353:ErdƑs–Nicolas 3351: 3349: 3346: 3344: 3341: 3340: 3337: 3332: 3328: 3322: 3318: 3304: 3301: 3299: 3296: 3295: 3293: 3291: 3287: 3281: 3278: 3276: 3273: 3271: 3268: 3266: 3263: 3262: 3260: 3258: 3254: 3248: 3245: 3243: 3240: 3238: 3235: 3233: 3230: 3228: 3225: 3223: 3220: 3219: 3217: 3215: 3211: 3205: 3202: 3200: 3197: 3196: 3194: 3192: 3188: 3182: 3179: 3177: 3174: 3172: 3171:Superabundant 3169: 3167: 3164: 3162: 3159: 3157: 3154: 3152: 3149: 3147: 3144: 3142: 3139: 3137: 3134: 3132: 3129: 3127: 3124: 3122: 3119: 3117: 3114: 3112: 3109: 3107: 3104: 3102: 3099: 3097: 3094: 3092: 3089: 3087: 3084: 3082: 3079: 3077: 3074: 3073: 3071: 3069: 3065: 3061: 3057: 3053: 3048: 3044: 3034: 3031: 3029: 3026: 3024: 3021: 3019: 3016: 3014: 3011: 3009: 3006: 3004: 3001: 2999: 2996: 2994: 2991: 2989: 2986: 2984: 2981: 2979: 2976: 2975: 2972: 2968: 2963: 2959: 2949: 2946: 2944: 2941: 2939: 2936: 2934: 2931: 2930: 2927: 2923: 2918: 2914: 2904: 2901: 2899: 2896: 2894: 2891: 2889: 2886: 2884: 2881: 2879: 2876: 2874: 2871: 2869: 2866: 2864: 2861: 2859: 2856: 2854: 2851: 2849: 2846: 2844: 2841: 2839: 2836: 2834: 2831: 2829: 2826: 2824: 2821: 2819: 2816: 2814: 2811: 2809: 2806: 2805: 2802: 2795: 2791: 2773: 2770: 2768: 2765: 2763: 2760: 2759: 2757: 2753: 2750: 2748: 2747:4-dimensional 2744: 2734: 2731: 2730: 2728: 2726: 2722: 2716: 2713: 2711: 2708: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2687: 2685: 2683: 2679: 2673: 2670: 2668: 2665: 2663: 2660: 2658: 2657:Centered cube 2655: 2653: 2650: 2649: 2647: 2645: 2641: 2638: 2636: 2635:3-dimensional 2632: 2622: 2619: 2617: 2614: 2612: 2609: 2607: 2604: 2602: 2599: 2597: 2594: 2592: 2589: 2587: 2584: 2582: 2579: 2577: 2574: 2573: 2571: 2569: 2565: 2559: 2556: 2554: 2551: 2549: 2546: 2544: 2541: 2539: 2536: 2534: 2531: 2529: 2526: 2524: 2521: 2519: 2516: 2515: 2513: 2511: 2507: 2504: 2502: 2501:2-dimensional 2498: 2494: 2490: 2485: 2481: 2471: 2468: 2466: 2463: 2461: 2458: 2456: 2453: 2451: 2448: 2446: 2445:Nonhypotenuse 2443: 2442: 2439: 2432: 2428: 2418: 2415: 2413: 2410: 2408: 2405: 2403: 2400: 2398: 2395: 2394: 2391: 2384: 2380: 2370: 2367: 2365: 2362: 2360: 2357: 2355: 2352: 2350: 2347: 2345: 2342: 2340: 2337: 2335: 2332: 2331: 2328: 2323: 2318: 2314: 2304: 2301: 2299: 2296: 2294: 2291: 2289: 2286: 2284: 2281: 2280: 2277: 2270: 2266: 2256: 2253: 2251: 2248: 2246: 2243: 2241: 2238: 2236: 2233: 2231: 2228: 2226: 2223: 2222: 2219: 2214: 2208: 2204: 2194: 2191: 2189: 2186: 2184: 2183:Perfect power 2181: 2179: 2176: 2174: 2173:Seventh power 2171: 2169: 2166: 2164: 2161: 2159: 2156: 2154: 2151: 2149: 2146: 2144: 2141: 2139: 2136: 2134: 2131: 2129: 2126: 2125: 2122: 2117: 2112: 2108: 2104: 2096: 2091: 2089: 2084: 2082: 2077: 2076: 2073: 2057: 2054: 2052: 2049: 2047: 2044: 2042: 2039: 2038: 2036: 2032: 2029: 2027: 2022: 2012: 2009: 2007: 2004: 2002: 1999: 1998: 1996: 1992: 1989: 1987: 1986:4-dimensional 1983: 1973: 1970: 1968: 1965: 1964: 1962: 1960: 1956: 1950: 1947: 1945: 1942: 1940: 1937: 1935: 1932: 1930: 1927: 1926: 1924: 1922: 1918: 1912: 1909: 1907: 1904: 1902: 1899: 1897: 1894: 1892: 1889: 1888: 1886: 1884: 1880: 1877: 1875: 1874:3-dimensional 1871: 1861: 1858: 1856: 1853: 1851: 1848: 1846: 1843: 1841: 1838: 1836: 1833: 1831: 1828: 1826: 1823: 1821: 1818: 1817: 1815: 1813: 1809: 1803: 1800: 1798: 1795: 1793: 1790: 1788: 1785: 1783: 1780: 1778: 1775: 1773: 1770: 1768: 1765: 1763: 1760: 1759: 1757: 1755: 1751: 1748: 1746: 1745:2-dimensional 1742: 1738: 1731: 1726: 1724: 1719: 1717: 1712: 1711: 1708: 1704: 1699: 1696: 1695: 1691: 1684: 1680: 1674: 1671: 1668: 1663: 1660: 1654: 1650: 1647: 1645: 1642: 1641: 1637: 1635: 1633: 1629: 1624: 1621: 1615: 1599: 1596: 1593: 1590: 1587: 1582: 1578: 1574: 1569: 1566: 1563: 1559: 1551: 1550: 1549: 1547: 1543: 1535: 1533: 1516: 1511: 1507: 1504: 1499: 1496: 1493: 1490: 1481: 1480: 1479: 1476: 1472: 1465: 1463: 1459: 1455: 1451: 1447: 1428: 1423: 1419: 1416: 1411: 1408: 1405: 1402: 1394: 1391: 1384: 1383: 1382: 1380: 1372: 1367: 1363: 1359: 1355: 1351: 1347: 1345: 1319: 1316: 1310: 1307: 1304: 1298: 1285: 1282: 1279: 1270: 1267: 1261: 1255: 1252: 1249: 1246: 1240: 1234: 1231: 1225: 1222: 1219: 1213: 1210: 1207: 1201: 1198: 1191: 1190: 1189: 1179: 1174: 1169: 1164: 1158: 1153: 1148: 1143: 1138: 1132: 1127: 1122: 1117: 1112: 1107: 1101: 1096: 1091: 1086: 1081: 1076: 1071: 1065: 1060: 1055: 1050: 1045: 1040: 1034: 1029: 1024: 1019: 1014: 1008: 1003: 998: 993: 989: 987: 984: 979: 974: 968: 963: 958: 953: 947: 942: 937: 932: 927: 921: 916: 911: 906: 900: 895: 890: 886: 884: 881: 876: 870: 865: 860: 854: 849: 845: 843: 840: 836: 831: 829: 826: 824: 821: 819: 816: 815: 812: 811: 810: 808: 800: 782: 779: 776: 773: 769: 765: 760: 757: 754: 751: 747: 743: 738: 735: 732: 729: 725: 721: 716: 713: 709: 701: 684: 680: 672: 657: 654: 651: 643: 625: 621: 613: 612: 608: 606: 603: 601: 597: 594:'s theory of 593: 588: 586: 581: 574: 572: 568: 547: 544: 541: 537: 533: 528: 525: 522: 519: 515: 511: 506: 503: 500: 496: 492: 489: 484: 480: 476: 471: 467: 463: 458: 455: 452: 448: 444: 439: 435: 427: 426: 425: 423: 415: 409: 403: 384: 381: 376: 373: 370: 366: 362: 357: 354: 351: 347: 343: 340: 337: 334: 331: 328: 325: 320: 317: 314: 310: 306: 301: 297: 289: 288: 287: 285: 280: 278: 273: 268: 264: 260: 256: 252: 248: 244: 240: 236: 232: 228: 224: 220: 216: 212: 210: 183: 180: 169: 166: 155: 152: 141: 136: 132: 129: 124: 120: 116: 110: 105: 101: 93: 92: 91: 86: 82: 80: 76: 72: 68: 61: 57: 53: 49: 45: 41: 37: 28: 22: 4409:Power series 4160: 4151:Lucas number 4103:Powers of 10 4083:Cubic number 3727:Transposable 3591:Narcissistic 3498:Digital root 3418:Super-Poulet 3378:Jordan–PĂłlya 3327:prime factor 3232:Noncototient 3199:Almost prime 3181:Superperfect 3156:Refactorable 3151:Quasiperfect 3126:Hyperperfect 2967:Pseudoprimes 2938:Wall–Sun–Sun 2873:Ordered Bell 2843:Fuss–Catalan 2755:non-centered 2705:Dodecahedral 2682:non-centered 2590: 2568:non-centered 2470:Wolstenholme 2215:× 2 ± 1 2212: 2211:Of the form 2178:Eighth power 2158:Fourth power 2034:non-centered 1994:non-centered 1929:Cube numbers 1921:non-centered 1829: 1812:non-centered 1802:Star numbers 1702: 1682: 1673: 1662: 1625: 1622: 1619: 1545: 1539: 1531: 1477: 1470: 1466: 1461: 1457: 1449: 1445: 1443: 1378: 1376: 1365: 1357: 1343: 1341: 1188:In general: 1187: 804: 642:compositions 604: 589: 575: 570: 566: 564: 421: 407: 401: 399: 283: 281: 213: 208: 206: 84: 83: 74: 70: 63: 59: 35: 33: 4276:Conditional 4264:Convergence 4255:Telescoping 4240:Alternating 4156:Pell number 3748:Extravagant 3743:Equidigital 3698:permutation 3657:Palindromic 3631:Automorphic 3529:Sum-product 3508:Sum-product 3463:Persistence 3358:ErdƑs–Woods 3280:Untouchable 3161:Semiperfect 3111:Hemiperfect 2772:Tesseractic 2710:Icosahedral 2690:Tetrahedral 2621:Dodecagonal 2322:Recursively 2193:Prime power 2168:Sixth power 2163:Fifth power 2143:Power of 10 2101:Classes of 2026:dimensional 1444:The number 4301:Convergent 4245:Convergent 3960:Graphemics 3833:Pernicious 3687:Undulating 3662:Pandigital 3636:Trimorphic 3237:Nontotient 3086:Arithmetic 2700:Octahedral 2601:Heptagonal 2591:Pentagonal 2576:Triangular 2417:SierpiƄski 2339:Jacobsthal 2138:Power of 3 2133:Power of 2 1655:References 44:triangular 4332:Divergent 4250:Divergent 4112:Advanced 4088:Factorial 4036:Sequences 3717:Parasitic 3566:Factorion 3493:Digit sum 3485:Digit sum 3303:Fortunate 3290:Primorial 3204:Semiprime 3141:Practical 3106:Descartes 3101:Deficient 3091:Betrothed 2933:Wieferich 2762:Pentatope 2725:pyramidal 2616:Decagonal 2611:Nonagonal 2606:Octagonal 2596:Hexagonal 2455:Practical 2402:Congruent 2334:Fibonacci 2298:Loeschian 1959:pyramidal 1683:MathWorld 1575:− 1505:≡ 1356:that the 1317:− 1308:− 1283:− 1253:− 1211:− 832:37=22+15 780:− 766:− 736:− 722:− 545:− 534:− 526:− 504:− 456:− 374:− 363:− 355:− 335:− 318:− 130:− 4520:Category 4505:Category 4271:Absolute 3789:Friedman 3722:Primeval 3667:Repdigit 3624:-related 3571:Kaprekar 3545:Meertens 3468:Additive 3455:dynamics 3363:Friendly 3275:Sociable 3265:Amicable 3076:Abundant 3056:dynamics 2878:Schröder 2868:Narayana 2838:Eulerian 2828:Delannoy 2823:Dedekind 2644:centered 2510:centered 2397:Amenable 2354:Narayana 2344:Leonardo 2240:Mersenne 2188:Powerful 2128:Achilles 1883:centered 1754:centered 1681:." From 1638:See also 75:outlines 71:distinct 52:pentagon 4281:Uniform 3962:related 3926:related 3890:related 3888:Sorting 3773:Vampire 3758:Harshad 3700:related 3672:Repunit 3586:Lychrel 3561:Dudeney 3413:StĂžrmer 3408:Sphenic 3393:Regular 3331:divisor 3270:Perfect 3166:Sublime 3136:Perfect 2863:Motzkin 2818:Catalan 2359:Padovan 2293:Leyland 2288:Idoneal 2283:Hilbert 2255:Woodall 2024:Higher 1632:A036353 1544:of the 1460:is the 827:19=12+7 583:in the 580:A001318 420:is the 275:in the 272:A000326 50:to the 4233:Series 4040:series 3828:Odious 3753:Frugal 3707:Cyclic 3696:Digit- 3403:Smooth 3388:Pronic 3348:Cyclic 3325:Other 3298:Euclid 2948:Wilson 2922:Primes 2581:Square 2450:Polite 2412:Riesel 2407:Knödel 2369:Perrin 2250:Thabit 2235:Fermat 2225:Cullen 2148:Square 2116:Powers 1630:entry 1542:Gnomon 1536:Gnomon 79:vertex 58:. The 4176:array 4056:Basic 3869:Prime 3864:Lucky 3853:sieve 3782:Other 3768:Smith 3648:Digit 3606:Happy 3581:Keith 3554:Other 3398:Rough 3368:Giuga 2833:Euler 2695:Cubic 2349:Lucas 2245:Proth 1452:is a 822:7=5+2 817:1=1+0 592:Euler 38:is a 4116:list 4038:and 3823:Evil 3503:Self 3453:and 3343:Blum 3054:and 2858:Lobb 2813:Cake 2808:Bell 2558:Star 2465:Ulam 2364:Pell 2153:Cube 1628:OEIS 1540:The 585:OEIS 410:− 1) 282:The 277:OEIS 267:1001 207:for 46:and 3941:Ban 3329:or 2848:Lah 1512:mod 1473:+ 1 644:of 587:). 412:th 279:). 263:247 259:210 255:176 251:145 247:117 4522:: 1634:) 1491:24 1469:24 1403:24 1368:. 602:. 406:(3 261:, 257:, 253:, 249:, 245:, 243:92 241:, 239:70 237:, 235:51 233:, 231:35 229:, 227:22 225:, 223:12 221:, 217:, 34:A 4118:) 4114:( 4028:e 4021:t 4014:v 2213:a 2094:e 2087:t 2080:v 1729:e 1722:t 1715:v 1600:1 1597:+ 1594:n 1591:3 1588:= 1583:n 1579:p 1570:1 1567:+ 1564:n 1560:p 1546:n 1517:6 1508:5 1500:1 1497:+ 1494:x 1471:x 1462:n 1458:x 1450:n 1446:x 1429:. 1424:6 1420:1 1417:+ 1412:1 1409:+ 1406:x 1395:= 1392:n 1379:x 1366:n 1358:n 1344:n 1325:) 1320:1 1314:) 1311:n 1305:1 1302:( 1299:3 1294:( 1289:) 1286:n 1280:1 1277:( 1271:2 1268:1 1262:+ 1259:) 1256:1 1250:n 1247:3 1244:( 1241:n 1235:2 1232:1 1226:= 1223:1 1220:+ 1217:) 1214:1 1208:n 1205:( 1202:n 1199:3 783:2 777:n 774:2 770:p 761:2 758:+ 755:n 752:2 748:p 744:= 739:1 733:n 730:8 726:p 717:n 714:8 710:p 685:n 681:p 658:8 655:+ 652:n 626:n 622:p 571:n 548:1 542:n 538:T 529:1 523:n 520:2 516:T 512:= 507:1 501:n 497:T 493:2 490:+ 485:n 481:T 477:= 472:2 468:n 464:+ 459:1 453:n 449:T 445:= 440:n 436:p 422:n 418:n 408:n 402:n 385:3 382:+ 377:2 371:n 367:p 358:1 352:n 348:p 344:2 341:= 338:2 332:n 329:3 326:+ 321:1 315:n 311:p 307:= 302:n 298:p 284:n 219:5 215:1 209:n 189:) 184:2 181:n 176:( 170:3 167:+ 161:) 156:1 153:n 148:( 142:= 137:2 133:n 125:2 121:n 117:3 111:= 106:n 102:p 88:n 85:p 66:n 64:p 60:n 23:.

Index

centered pentagonal number

figurate number
triangular
square numbers
pentagon
rotationally symmetrical
vertex
1
5
12
22
35
51
70
92
117
145
176
210
247
1001
A000326
OEIS
triangular number
A001318
OEIS
Euler
integer partitions
pentagonal number theorem

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