id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A111219
[ 1, 9, 9, 45, 9, 81, 9, 165, 45, 81, 9, 405, 9, 81, 81, 495, 9, 405, 9, 405, 81, 81, 9, 1485, 45, 81, 165, 405, 9, 729, 9, 1287, 81, 81, 81, 2025, 9, 81, 81, 1485, 9, 729, 9, 405, 405, 81, 9, 4455, 45, 405, 81, 405,...
[ "mult", "nonn" ]
A334175
[ 2, 12, 180, 360, 6300, 37800, 75600, 485100, 14553000, 69369300, 87318000, 174636000, 14567553000, 15330615300, 437026590000, 2622159540000, 4951788741900, 5244319080000, 35413721343000, 2163931680210300, 7436881482030000, 148702215919257000, 223106444460900000 ]
[ "nonn" ]
A171078
[ 1, 1, 7, 62, 127, 146, 2828954, 32764, 16931177, 11499383114, 183092554714, 13299018868, 3965530936622474, 88306001369044, 260212136880609060, 7.400951287808331e+21, 1.655564086548652e+22, 16179883156293315000, 5.833457068512743e+28 ]
[ "nonn", "frac" ]
A311359
[ 1, 4, 8, 12, 16, 22, 27, 29, 32, 37, 42, 47, 51, 54, 57, 62, 68, 72, 76, 80, 83, 87, 92, 96, 100, 105, 110, 113, 116, 121, 126, 131, 135, 137, 140, 146, 152, 156, 159, 163, 167, 171, 176, 180, 184, 189, 193, 196, 200, ...
[ "nonn" ]
A385700
[ 0, 4, 8, 21, 23, 25, 27, 29, 40, 42, 44, 46, 48, 61, 63, 65, 67, 69, 80, 82, 84, 86, 88, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, ...
[ "nonn", "base", "easy", "look" ]
A284266
[ 1, 2, 1, 3, 2, 3, 1, 4, 3, 3, 2, 3, 3, 4, 1, 5, 4, 3, 3, 2, 1, 3, 2, 3, 3, 4, 3, 3, 4, 5, 1, 6, 5, 3, 4, 3, 3, 2, 3, 3, 2, 3, 1, 4, 3, 3, 2, 3, 3, 4, 3, 3, 2, 3, 3, 4, 3, 5, 4, 3, 5, 6, 1, 7...
[ "nonn" ]
A224689
[ 6713, 2591, 2862, 3214, 3540, 3819, 4572, 5723, 7181, 8868, 10729, 13235, 16781, 21671, 28131, 36332, 46916, 60920, 79685, 104778, 137937, 181542, 239010, 315099, 416134, 550178, 727674, 962482, 1273220, 1684831, 2230321, 2953139, 3910594 ]
[ "nonn" ]
A248496
[ 22, 183, 1804, 9865, 35832, 87071, 182304, 317153, 493206, 715865, 980740, 1306771, 1688302, 2149427, 2686738, 3316625, 4024532, 4837255, 5739878, 6760847, 7917490, 9189229, 10578068, 12135239, 13841916, 15691573, 17708874, 19923189, 22305204 ]
[ "nonn" ]
A235607
[ 1, 2, 4, 7, 13, 22, 39, 67, 108, 183, 305, 510, 851 ]
[ "nonn", "more" ]
A232448
[ 0, 13, 42, 506, 608, 2472, 2623, 28291, 181298 ]
[ "nonn", "more", "hard" ]
A163790
[ 2, 17, 98, 174, 181, 238, 6774, 9057, 44929, 54594, 58389 ]
[ "nonn", "more" ]
A102043
[ 4, 6, 12, 30, 124, 122, 418, 98, 220, 346, 308, 1274, 1144, 962, 556, 2512, 3526, 1382 ]
[ "dead" ]
A106723
[ 3251, 4373, 14293, 14303, 27073, 106103, 200041, 200063, 210011, 210019, 549977, 710573, 710599, 799817, 799837, 851113, 851117, 1045021, 1063319, 1101071, 1102001, 1104113, 1104119, 1133513, 1133519, 1245227, 1245281, 1436003 ]
[ "base", "nonn" ]
A317709
[ 1, 2, 3, 5, 6, 10, 11, 12, 13, 15, 18, 20, 22, 24, 26, 29, 30, 31, 33, 37, 40, 41, 44, 45, 47, 48, 50, 52, 54, 55, 58, 60, 61, 62, 66, 71, 72, 74, 75, 78, 79, 80, 82, 88, 89, 90, 93, 94, 96, 99, 101, 104, 108, ...
[ "nonn" ]
A167867
[ 1, 10, 236, 8472, 359944, 16722896, 822334816, 42068907200, 2215884717400, 119364801362800, 6545334930678816, 364137834051739200, 20502307365808906000, 1.1660633139638338e+21, 6.689343968036996e+22 ]
[ "nonn" ]
A183007
[ 3592, 169659, 1312544, 9032603 ]
[ "nonn", "more" ]
A223319
[ 3125, 3570125, 4176940625, 4903804407125, 5759605530667625, 6765094542682458000, 7.946162712131677e+21, 9.333430848774502e+24, 1.0962893764533342e+28, 1.287683410368535e+31 ]
[ "nonn" ]
A359275
[ 0, 0, 0, 2, 4, 6, 8, 11, 14, 18, 21, 25, 29, 33, 38, 43, 48, 53, 58, 63, 69, 75, 81, 87, 93, 100, 106, 113, 120, 127, 134, 141, 149, 156, 164, 172, 180, 188, 196, 204, 212, 221, 230, 238, 247, 256, 265, 275, 284, 294, ...
[ "nonn" ]
A090702
[ 0, 0, 1, 1, 1, 2, 2, 2, 3, 4, 4, 4, 5, 5, 5, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 10, 11, 11, 11, 12, 13, 13, 13, 14, 14 ]
[ "nonn", "base", "more" ]
A038153
[ 22, 44, 67, 89, 112, 134, 157, 179, 202, 224, 247, 269, 291, 314, 336, 359, 381, 404, 426, 449, 471, 494, 516, 539, 561, 583, 606, 628, 651, 673, 696, 718, 741, 763, 786, 808, 830, 853, 875, 898, 920, 943, 965, 988, 1010, 1033...
[ "nonn" ]
A062148
[ 1, 14, 168, 2016, 25200, 332640, 4656960, 69189120, 1089728640, 18162144000, 319653734400, 5928123801600, 115598414131200, 2365321396838400, 50685458503680000, 1135354270482432000, 26538906072526850000, 646300418472124400000, 1.6372943934627152e+22 ]
[ "nonn", "easy" ]
A291800
[ 0, 5, 0, 6, 15, 15, 0, 0, 0, 15, 15, 15, 15, 15, 0, 15, 0, 15, 15, 12, 15, 15, 15, 15, 19, 19, 13, 15, 0, 19, 0, 15, 15, 13, 0, 0, 15, 15, 15, 0, 0, 0, 13, 0, 19, 19, 13, 14, 0, 19, 19, 0, 17, 0, 13, 19, ...
[ "nonn" ]
A252789
[ 7, 19, 39, 43, 87, 135, 147, 177, 223, 255, 403 ]
[ "nonn", "more" ]
A011496
[ 1, 0, 5, 8, 0, 3, 4, 6, 2, 2, 5, 4, 8, 5, 0, 7, 1, 5, 3, 1, 3, 4, 8, 5, 1, 2, 7, 0, 8, 7, 5, 4, 0, 3, 8, 0, 0, 9, 8, 2, 8, 3, 0, 0, 7, 4, 1, 8, 1, 6, 1, 1, 8, 6, 3, 9, 8, 1, 1, 9, 9, 7, 2, 1...
[ "nonn", "cons" ]
A192616
[ 1, 0, 1, 1, 2, 6, 10, 29, 57, 142, 309, 720, 1625, 3714, 8457, 19259, 43902, 99970, 227830, 518943, 1182401, 2693624, 6136837, 13980960, 31851853, 72565704, 165320833, 376638417, 858066430, 1954869262, 4453630790, 10146374277, 23115721705 ]
[ "nonn", "easy" ]
A161000
[ 1, 4, 3, 35, 24, 7, 536, 391, 112, 15, 16775, 12400, 3599, 480, 31, 1060976, 790031, 229856, 30751, 1984, 63, 135007759, 100893152, 29390879, 3934144, 254015, 8064, 127, 34460631520, 25799194655, 7520126912, 1006886975, 65019776, 2064511 ]
[ "base", "nonn", "tabl" ]
A327271
[ 1, 2, 6, 8, 40, 48, 336, 128, 864, 1280, 8448, 3072, 39936 ]
[ "nonn", "more" ]
A349379
[ 1, 0, 0, 3, 0, 0, 0, 4, 8, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 24, 0, 18, 0, 0, 0, 0, 16, 0, 0, 0, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0...
[ "nonn", "mult" ]
A333503
[ 630, 630, 630, 630, 630, 630, 630, 420, 210, 450, 180, 210, 420, 180, 450, 210, 330, 90, 420, 210, 420, 210, 630, 630, 630, 630, 420, 210, 630, 630, 630, 210, 420, 630, 630, 630, 630, 630, 630, 90, 330, 210, 630, 630, 630, 210...
[ "nonn" ]
A297968
[ 0, 4, 0, 0, 0, 6, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, ...
[ "nonn" ]
A367167
[ 0, 2, 3, 4, 5, 12, 7, 8, 9, 20, 11, 30, 13, 28, 30, 16, 17, 30, 19, 70, 42, 44, 23, 78, 25, 52, 27, 126, 29, 90, 31, 32, 66, 68, 70, 72, 37, 76, 78, 290, 41, 126, 43, 286, 120, 92, 47, 210, 49, 70, 102, 390, 53, ...
[ "nonn" ]
A038751
[ 0, 1, 1, 0, 1, 1, 2, 3, 6, 9, 18, 30, 60, 105, 210, 381, 765, 1425, 2868, 5454, 11004, 21210, 42930, 83673, 169851, 333843, 679602, 1345476, 2745636, 5467275, 11182365, 22379895, 45866418, 92180781, 189275955, 381831396, 785328636 ]
[ "nonn" ]
A383370
[ 1, 1, 2, 3, 12, 25, 172, 482, 5318, 19675, 333768, 1609846, 40832554, 254370640, 9459449890, 75546875426, 4061670272088 ]
[ "nonn", "hard", "more" ]
A288151
[ 1, 5, 7, 8, 13, 20, 33, 39, 43, 51, 91, 113, 119, 132, 208, 411, 525, 581, 931, 1552, 4829, 17537, 40301, 43429 ]
[ "nonn", "more", "hard" ]
A271592
[ 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 2, 1, 1, 0, 1, 0, 4, 0, 1, 0, 1, 4, 8, 8, 1, 1, 0, 1, 0, 23, 0, 16, 0, 1, 0, 1, 8, 55, 86, 47, 32, 1, 1, 0, 1, 0, 144, 0, 397, 0, 64, 0, 1, 0, 1, 16, 360, 948, ...
[ "nonn", "tabl" ]
A246346
[ 1, 2, 3, 5, 8, 10, 15, 18, 25, 28, 38, 42, 55, 60, 77, 84, 105, 115, 140, 152, 183, 198, 235, 253, 298, 320, 372, 399, 462, 494, 566, 605, 692, 736, 838, 891, 1007, 1072, 1205, 1280, 1432, 1521, 1698, 1800, 2002, 2120, 2352,...
[ "nonn" ]
A155030
[ 5, 11, 17, 31, 41, 67, 109, 127, 157, 191, 211, 241, 277, 331, 367, 401, 461, 509, 547, 563, 587, 599, 617, 739, 773, 797, 859, 877, 919, 967, 991, 1031, 1063, 1087, 1153, 1171, 1201, 1217, 1297, 1409, 1447, 1471, 1499, 1523, 15...
[ "nonn", "base" ]
A271307
[ 1, 5, 14, 46, 59, 143, 164, 336, 361, 633, 682, 1090, 1171, 1743, 1816, 2620, 2749, 3705, 3870, 5130, 5291, 6811, 7000, 8804, 9017, 11141, 11362, 13878, 14183, 16995, 17384, 20652, 21025, 24629, 25042, 29158, 29623, 34315, 34784, 39852, ...
[ "nonn", "easy" ]
A078530
[ 0, 3, 1, 1, 1, 1, 2, 3, 9, 27, 81, 729, 0, 59049, -531441, 14348907, -387420489, 10460353203, -564859072962, 22876792454961, -1853020188851841, 150094635296999140, -12157665459056929000, 2.9543127065508336e+21, 0 ]
[ "sign", "easy" ]
A141867
[ 3, 3, 5, 7, 11, 13, 17, 17, 23, 31, 29, 37, 43, 47, 53, 61, 61, 61, 71, 79, 83, 101, 103, 107, 113, 137, 137, 139, 151, 163, 167, 163, 167, 173, 173, 179, 181, 199, 211, 211, 223, 229, 233, 233, 239, 233, 251, 251, 263, ...
[ "nonn", "less" ]
A044630
[ 62, 126, 190, 254, 318, 382, 446, 503, 510, 574, 638, 702, 766, 830, 894, 958, 1015, 1022, 1086, 1150, 1214, 1278, 1342, 1406, 1470, 1527, 1534, 1598, 1662, 1726, 1790, 1854, 1918, 1982, 2039, 2046, 2110, 2174, 2238, 2302 ]
[ "nonn", "base" ]
A140285
[ 1, 15, 10671 ]
[ "bref", "more", "nonn" ]
A259383
[ 0, 1, 2, 3, 4, 6, 18, 36, 186, 438, 2268, 2709, 11898, 18076, 151596, 228222, 563786, 5359842, 32285433, 257161401, 551366532, 621319212, 716064597, 2459962002, 5018349804, 5067084204, 7300948726, 42360367356, 139853034114, 176616961826, 469606524278, 66...
[ "nonn", "base" ]
A180068
[ 2, 2, 6, 16, 34, 140, 508, 2100, 9386, 44398, 214410, 1103178, 6002116, 33772692, 196340714, 1190396084, 7486976948, 48456599516, 322526380686, 2215295406072, 15651462450174, 113259396917170 ]
[ "nonn" ]
A362989
[ 1, 1, 1, 6, 2, 30, 10, 420, 84, 1260, 420, 13860, 132, 180180, 60060, 360360, 24024, 6126120, 291720, 116396280, 705432, 116396280, 38798760, 2677114440, 9806280, 13385572200, 13385572200, 40156716600, 2677114440, 1164544781400, 5041319400, 7220177644680...
[ "nonn" ]
A262332
[ 2, 3, 3, 6, 5, 6, 11, 15, 15, 11, 22, 33, 90, 33, 22, 43, 99, 351, 351, 99, 43, 86, 261, 2106, 2399, 2106, 261, 86, 171, 783, 10935, 26131, 26131, 10935, 783, 171, 342, 2241, 65610, 252097, 570922, 252097, 65610, 2241, 342, 68...
[ "nonn", "tabl", "changed" ]
A216270
[ 1, 2, 5, 14, 69, 99, 495, 1364, 1365, 2010, 2735, 3099, 3914, 4359, 4389, 5984, 6669, 8435, 9164, 10794, 12075, 15224, 15315, 16014, 16470, 17900, 20214, 20769, 21204, 23450, 24240, 26430, 26690, 27300, 29099, 35189, 38415, 38745, 42944, ...
[ "nonn" ]
A220009
[ 84, 263, 17525, 983187, 44269383, 1708594026 ]
[ "nonn" ]
A029427
[ 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 2, 0, 1, 0, 1, 1, 2, 1, 2, 0, 2, 2, 4, 1, 2, 1, 3, 2, 5, 2, 4, 2, 4, 4, 7, 2, 5, 3, 6, 5, 8, 4, 8, 4, 8, 7, 11, 5, 9, 6, 11, 8, 13, 8, 13, 8, 13, 11, 17, 9, ...
[ "nonn", "easy" ]
A037461
[ 1, 2, 3, 7, 8, 9, 10, 14, 15, 16, 17, 21, 22, 23, 24, 49, 50, 51, 52, 56, 57, 58, 59, 63, 64, 65, 66, 70, 71, 72, 73, 98, 99, 100, 101, 105, 106, 107, 108, 112, 113, 114, 115, 119, 120, 121, 122, 147, 148, 149, 150, ...
[ "nonn", "base" ]
A222987
[ 2, 4, 7, 25, 86, 332, 1172, 4566, 16562, 64718, 238856, 933970, 3493494, 13656426, 51627746, 201696470, 768828322, 3002421486, 11518434130, 44975259758, 173404040458, 677168068918, 2621003912178, 10238867982150, 39750857800978 ]
[ "nonn" ]
A031700
[ 122, 486, 1092, 1940, 3030, 4362, 5936, 7752, 9810, 12110, 14652, 17436, 20462, 23730, 27240, 30992, 34986, 39222, 43700, 48420, 53382, 58586, 64032, 69720, 70248, 75650, 81822, 88236, 94892, 101790, 108930, 116312, 123936, 131802, 139910 ]
[ "nonn" ]
A250587
[ 639, 3641, 17718, 79415, 333355, 1347397, 5284985, 20355558, 77281643, 290814703, 1086782674, 4044122800, 14999512012, 55523390718, 205218626587, 757840894067, 2796700223479, 10316975388347, 38048035207739, 140296439330149 ]
[ "nonn" ]
A158842
[ 1, 1, 4, 13, 31, 61, 106, 169, 253, 361, 496, 661, 859, 1093, 1366, 1681, 2041, 2449, 2908, 3421, 3991, 4621, 5314, 6073, 6901, 7801, 8776, 9829, 10963, 12181, 13486, 14881, 16369, 17953, 19636, 21421, 23311, 25309, 27418, 29641, 31981,...
[ "nonn", "easy" ]
A023555
[ 0, 0, 1, 0, 0, 2, 0, 0, 1, 2, 0, 0, 2, 0, 2, 0, 1, 2, 0, 0, 2, 2, 0, 2, 0, 0, 1, 4, 0, 0, 2, 0, 2, 0, 2, 2, 0, 0, 3, 2, 0, 0, 2, 0, 2, 2, 0, 4, 0, 0, 0, 2, 1, 2, 2, 0, 2, 2, 0, 0, 2, 2, 2, 0...
[ "nonn" ]
A329153
[ 0, 1, 3, 6, 10, 3, 9, 16, 24, 10, 20, 9, 21, 9, 24, 39, 55, 24, 42, 21, 21, 20, 42, 23, 47, 21, 47, 42, 70, 24, 54, 85, 41, 55, 47, 47, 83, 42, 47, 70, 110, 21, 63, 54, 117, 42, 88, 54, 102, 47, 117, 83, 135, 4...
[ "nonn" ]
A089792
[ 0, 1, 2, 2, 3, 4, 4, 5, 6, 5, 6, 7, 7, 8, 9, 9, 10, 11, 10, 11, 12, 12, 13, 14, 14, 15, 16, 14, 15, 16, 16, 17, 18, 18, 19, 20, 19, 20, 21, 21, 22, 23, 23, 24, 25, 24, 25, 26, 26, 27, 28, 28, 29, 30, 28, 29...
[ "easy", "nonn" ]
A298416
[ 1, 1, 1, 3, 7, 19, 49, 133, 357, 973, 2641, 7209, 19651, 53671, 146511, 400231, 1093127, 2986359, 8157999, 22287743, 60888843, 166350531, 454471539, 1241636931, 3392197289, 9267648789, 25319638485, 69174520877, 188988172213, 516325239669, 1410626423533 ]
[ "nonn", "easy" ]
A081735
[ 1, 3, 4, 5, 7, 11, 13, 17, 19, 23, 25, 29, 30, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 121, 127, 131, 137, 139, 149, 151, 157, 163, 167, 169, 173, 179, 181, 191, 193, ...
[ "nonn" ]
A243757
[ 1, 1, 1, 1, 1, 5, 5, 5, 5, 5, 25, 25, 25, 25, 25, 125, 125, 125, 125, 125, 625, 625, 625, 625, 625, 15625, 15625, 15625, 15625, 15625, 78125, 78125, 78125, 78125, 78125, 390625, 390625, 390625, 390625, 390625, 1953125, 1953125, 1953...
[ "nonn" ]
A252084
[ 687, 2595, 11186, 47266, 199064, 846257, 3603209, 15363231, 65536806, 279433103, 1191679629, 5083746174, 21686819544, 92508524702, 394621790278, 1683414777634, 7181262271286, 30634453136010, 130683641418097 ]
[ "nonn" ]
A338449
[ 1, 2, 2, 6, 3, 3, 5, 10, 10, 2, 7, 14, 14, 6, 15, 30, 10, 2, 11, 22, 22, 6, 21, 42, 14, 6, 3, 33, 55, 110, 10, 26, 13, 39, 6, 6, 2, 17, 34, 34, 38, 19, 57, 15, 30, 70, 42, 21, 51, 85, 170, 10, 46, 23, 69, 6...
[ "nonn" ]
A013137
[ 2, -16, 800, -97536, 22208000, -8125689856, 4360566579200, -3226435003416576, 3148058338141798400, -3.9162716391062855e+21, 6.050134274987714e+24, -1.1363591103950667e+28 ]
[ "sign" ]
A060189
[ 1, 23, 230, 1682, 10543, 60657, 331612, 1756340, 9116141, 46702427, 237231970, 1198382694, 6031771195, 30287995733, 151856096504, 760614930344, 3807336276505, 19050241098975, 95294209168414, 476607030432890 ]
[ "nonn", "easy" ]
A233213
[ 23, 7222, 3054973, 1340889772, 591021089923, 260625046992322, 114934898294104880, 50686253523654310000, 2.2352636009353304e+22, 9.85751239219047e+24, 4.347162960647216e+27 ]
[ "nonn" ]
A005322
[ 1, 3, 9, 25, 69, 189, 518, 1422, 3915, 10813, 29964, 83304, 232323, 649845, 1822824, 5126520, 14453451, 40843521, 115668105, 328233969, 933206967, 2657946907, 7583013474, 21668135850, 62007732605, 177696228411, 509899901553, 1464990733969, 4214045993925 ]
[ "nonn" ]
A160049
[ 1, 1, 1, 3, 6, 5, 10, 35, 140, 126, 1260, 1155, 13860, 12870, 12012, 45045, 360360, 340340, 2042040, 1939938, 369512, 117572, 2586584, 7436429, 178474296, 171609900, 1487285800, 1434168450, 40156716600, 38818159380, 1164544781400 ]
[ "nonn", "frac" ]
A202893
[ 776, 3264, 17116, 81308, 369152, 1719383, 7994866, 36814964, 169690932, 782928672, 3607748374, 16618930336, 76567343262, 352730598652, 1624800857183, 7484393222731, 34475664616145, 158804587990863, 731493751662765 ]
[ "nonn" ]
A332300
[ 1, 1, 1, 1, 1, 5, 691, 7, 3617, 43867, 283, 11, 103, 13, 7, 5, 37, 17, 26315271553053480000, 19, 137616929, 1.520097643918071e+21, 11, 23, 653, 5, 13, 39409, 7, 29, 2003, 31, 1226592271, 11, 17, 5, 3112655297839, 37, 19, 13, 631, 41, ...
[ "nonn" ]
A326925
[ 1, -1, 0, 2, -1, 1, 0, 3, -1, 1, 4, 0, 4, -1, 2, 5, 10, 0, 5, -1, 3, 12, 15, 20, 0, 6, -1, 5, 21, 42, 35, 35, 0, 7, -1, 8, 40, 84, 112, 70, 56, 0, 8, -1, 13, 72, 180, 252, 252, 126, 84, 0, 9, -1, 21, 130, ...
[ "tabf", "sign" ]
A021731
[ 0, 0, 1, 3, 7, 5, 5, 1, 5, 8, 1, 8, 4, 3, 1, 9, 1, 1, 9, 6, 6, 9, 8, 7, 6, 2, 0, 3, 5, 7, 6, 3, 4, 1, 1, 2, 7, 9, 2, 2, 9, 7, 1, 1, 1, 4, 1, 6, 7, 8, 1, 2, 9, 2, 9, 8, 4, 8, 6, 9, 3, 2, 5, 9...
[ "nonn", "cons", "easy" ]
A000755
[ 0, 1, 2, 11, 32, 50, 132, 380, 368, 1135, 1120, 4348, 3622, 10568, 30634, 46304, 55576, 152210 ]
[ "nonn", "nice", "more" ]
A258149
[ 1, 0, 7, 7, 0, 17, 0, 1, 0, 31, 23, 0, 0, 0, 49, 0, 17, 0, 23, 0, 71, 47, 0, 7, 0, 41, 0, 97, 0, 41, 0, 7, 0, 0, 0, 127, 79, 0, 31, 0, 0, 0, 89, 0, 161, 0, 73, 0, 17, 0, 47, 0, 119, 0, 199, 119, 0, 0, ...
[ "nonn", "easy", "tabl" ]
A203963
[ 17559, 1512850, 632607409, 307121002440, 136086136646160, 50733485047025530, 16109192511515894000, 4.4332548417095226e+21, 1.0766350728875125e+24, 2.341461418726129e+26, 4.61482237195331e+28 ]
[ "nonn" ]
A069859
[ 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 2, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 2, 1, 2, 1, 0, 1, 1, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0...
[ "nonn", "look" ]
A078057
[ 1, 3, 7, 17, 41, 99, 239, 577, 1393, 3363, 8119, 19601, 47321, 114243, 275807, 665857, 1607521, 3880899, 9369319, 22619537, 54608393, 131836323, 318281039, 768398401, 1855077841, 4478554083, 10812186007, 26102926097, 63018038201, 152139002499, 367296043199...
[ "nonn", "easy" ]
A047165
[ 0, 0, 0, 0, 0, 0, 3, 4, 20, 25, 75, 90, 210, 245, 511, 588, 1260, 1458, 3510, 4125, 10725, 12705, 32835, 38830, 96382, 113399, 273273, 320411, 770315, 903175, 2208115, 2594540, 6451500, 7594920, 18990768, 22366458, 55715562, 65579982, 16248...
[ "nonn" ]
A182170
[ 1, 0, 8, 2, 0, 5, 1, 4, 4, 5, 1, 9, 2, 3, 9, 5, 0, 6, 5, 0, 3, 3, 6, 8, 1, 5, 2, 8, 8, 9, 7, 8, 9, 8, 5, 5, 7, 5, 3, 9, 3, 0, 6, 3, 8, 4, 7, 0, 0, 0, 3, 1, 9, 5, 4, 7, 3, 7, 3, 4, 0, 1, 3, 4...
[ "nonn", "cons" ]
A071659
[ 0, 1, 3, 2, 7, 8, 4, 6, 5, 17, 18, 20, 21, 22, 10, 9, 14, 16, 19, 11, 12, 15, 13, 45, 46, 48, 49, 50, 54, 55, 57, 58, 59, 61, 62, 63, 64, 26, 27, 23, 25, 24, 38, 37, 42, 44, 47, 51, 53, 56, 60, 29, 28, 30, 32...
[ "nonn" ]
A240312
[ 1, 1, 0, 0, 2, 1, 2, 0, 2, 3, 5, 5, 9, 7, 11, 11, 18, 15, 28, 27, 41, 43, 62, 64, 91, 96, 127, 140, 184, 200, 260, 287, 365, 410, 511, 573, 717, 803, 985, 1120, 1359, 1538, 1859, 2106, 2522, 2870, 3407, 3872, 4586, 520...
[ "nonn", "easy" ]
A341209
[ 1, 5, 12, 23, 39, 61, 90, 127, 173, 229, 296, 375, 467, 573, 694, 831, 985, 1157, 1348, 1559, 1791, 2045, 2322, 2623, 2949, 3301, 3680, 4087, 4523, 4989, 5486, 6015, 6577, 7173, 7804, 8471, 9175, 9917, 10698, 11519, 12381, 13285, 14...
[ "nonn", "easy" ]
A004790
[ 2, 3, 8, 21, 55, 149, 404, 1097, 2981, 162755, 1202605, 3269018, 8886111, 24154953, 178482301, 9744803447, 26489122130, 195729609429, 532048240602, 1446257064292, 3931334297145, 10686474581525, 29048849665248, 78962960182681, 583461742527455, 1586013452313431 ]
[ "nonn" ]
A098057
[ 1, 1, 1, 2, 4, 8, 15, 27, 48, 84, 147, 257, 451, 796, 1413, 2526, 4544, 8226, 14978, 27417, 50434, 93183, 172865, 321857, 601263, 1126644, 2116968, 3987960, 7530200, 14249649, 27019301, 51327965, 97676156, 186177568, 355406479, 679425009 ]
[ "nonn" ]
A052090
[ 98689, 9686869, 9809089, 9888889, 9889889, 9896989, 9908099, 9980899, 9989899, 900808009, 906686609, 906868609, 906989609, 908000809, 908060809, 908808809, 908888809, 909868909, 960898069, 968606869, 968666869, 968868869, 968898869 ]
[ "nonn", "base" ]
A056769
[ 1, 9, 64, 601, 5616 ]
[ "nonn" ]
A137600
[ 18, 32, 36, 144, 576, 36864, 589824, 2359296, 9663676416 ]
[ "more", "nonn" ]
A088852
[ 1, 20, 5376, 22282240, 1464583847936, 1536853372840181800, 2.5788843362951133e+25, 6.922956840496418e+33, 2.9734213503918524e+43, 2.0433254391523354e+54 ]
[ "nonn" ]
A253861
[ 3727552, 196953728, 9090451328, 440235663616, 20237970640000, 940320056130304, 43112542683771520, 1976682724770244600, 90524327137135130000, 4.15968484008366e+21, 1.9068437860844206e+23 ]
[ "nonn" ]
A072830
[ 9, 18, 27, 36, 45, 54, 63, 72, 81, 88, 97, 104, 109, 112, 113, 112, 109, 104, 97, 102, 109, 118, 125, 130, 133, 134, 133, 130, 125, 128, 133, 140, 149, 156, 161, 164, 165, 164, 161, 162, 165, 170, 177, 186, 193, 198, 201, ...
[ "nonn", "base" ]
A116544
[ 0, 1, 3, 6, 10, 28, 45, 55, 78, 105, 120, 190, 210, 231, 253, 276, 300, 325, 378, 406, 435, 465, 528, 561, 595, 630, 703, 741, 780, 820, 861, 903, 990, 1035, 1081, 1128, 1225, 1275, 1378, 1485, 1540, 1596, 1653, 1770, 1830, 20...
[ "nonn", "base" ]
A001475
[ 1, 2, 5, 13, 38, 116, 382, 1310, 4748, 17848, 70076, 284252, 1195240, 5174768, 23103368, 105899656, 498656912, 2404850720, 11879332048, 59976346448, 309442319456, 1628921941312, 8746095288800, 47840221880288, 266492604100288, 1510338372987776 ]
[ "nonn" ]
A272408
[ 1, 0, 9, 3, 3, 6, 4, 1, 6, 4, 2, 8, 2, 3, 0, 6, 6, 3, 9, 9, 2, 2, 4, 4, 7, 7, 0, 1, 1, 7, 3, 0, 7, 3, 4, 6, 8, 1, 6, 9, 9, 5, 6, 2, 3, 3, 7, 4, 1, 1, 1, 4, 2, 6, 4, 1, 1, 4, 9, 7, 2, 9, 9, 4...
[ "nonn", "cons", "easy" ]
A172816
[ 1, 19, 415, 10147, 261331, 7100821, 200148649, 5796870115, 171475190227, 5158851352489, 157366288875709, 4855940642591941, 151309409779981280, 4754260599949620000, 150466404665460300000, 4.792275283921293e+21 ]
[ "nonn" ]
A029607
[ 8, 24, 26, 14, 50, 40, 48, 90, 20, 80, 196, 308, 322, 224, 100, 26, 276, 504, 630, 546, 324, 126, 120, 780, 1134, 1176, 870, 450, 32, 1914, 2310, 2046, 1320, 168, 638, 1650, 4224, 4356, 3366, 792, 222, 38, 806, 2288, 8580, 772...
[ "nonn", "tabf", "easy" ]
A216946
[ 1, 3, 12, 46, 209, 976, 4767, 23680, 119940 ]
[ "nonn" ]
A007313
[ 1, -1, -3, -41, -1035, -40721, -2291331, -174783865, -17394878523, -2192620580129, -341767803858867, -64587124941406470, -14555427555355013000, -3.8572898209493156e+21 ]
[ "sign" ]
A069243
[ 560, 1800, 1078000, 16250, 1018710000, 75968750 ]
[ "nonn", "frac" ]
A128570
[ 1, 1, 1, 1, 2, 4, 1, 3, 12, 28, 1, 4, 24, 114, 276, 1, 5, 40, 288, 1440, 3480, 1, 6, 60, 580, 4440, 22368, 53232, 1, 7, 84, 1020, 10560, 82080, 409248, 955524, 1, 8, 112, 1638, 21420, 226560, 1752000, 8585088, 19672320, 1, 9...
[ "nonn", "tabl" ]
A193838
[ 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 13, 15, 16, 18 ]
[ "nonn", "hard", "more" ]
A036507
[ 0, 100, 102400, 10000, 10240000, 1000000, 1024000000, 100000000, 102400000000, 10000000000, 10240000000000, 1000000000000, 1024000000000000, 100000000000000, 102400000000000000, 10000000000000000, 10240000000000000000, 1000000000000000000, 1.024e+21 ]
[ "nonn", "base", "easy" ]