id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A022976
[ 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, -30, ...
[ "sign" ]
A244293
[ 6, 6, 7, 2, 5, 3, 8, 2, 2, 7, 2, 3, 1, 3, 2, 8, 4, 9, 3, 5, 3, 5, 8, 2, 4, 8, 0, 5, 9, 1, 8, 8, 4, 4, 6, 4, 8, 3, 7, 5, 6, 8, 4, 6, 8, 9, 7, 3, 6, 7, 1, 8, 9, 8, 3, 6, 8, 5, 0, 1, 8, 0, 2, 4...
[ "nonn", "cons" ]
A235493
[ 0, 1, 2, 4, 3, 7, 8, 5, 16, 6, 14, 17, 12, 19, 10, 28, 32, 11, 9, 53, 21, 20, 34, 13, 64, 49, 38, 24, 15, 43, 56, 59, 48, 68, 22, 35, 18, 37, 106, 76, 112, 67, 40, 29, 51, 42, 26, 107, 128, 25, 98, 44, 57, 131,...
[ "nonn" ]
A305110
[ 1, 1, 6, 69, 1292, 35795, 1381662, 71137787, 4723263400, 393582311685, 40255365257750, 4961198428428121, 725404352867194100, 124184747391389560000, 2.4610467350470768e+22, 5.59055539684576e+24, 1.4431985983483375e+27, 4.2017125719487e+29, 1.3703036626327586e+32, 4.9758716350139...
[ "nonn" ]
A274376
[ 1, 1, 1, 1, 2, 3, 5, 8, 12, 20, 32, 52, 84, 135, 219, 353, 572, 924, 1495, 2419, 3912, 6331, 10240, 16570, 26807, 43374, 70178, 113546, 183721, 297258, 480974, 778220, 1259184, 2037389, 3296554, 5333923, 8630446, 13964340, 22594740, 36559...
[ "nonn" ]
A175069
[ 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 3, 1, 1, 1, 1, 2, 1, 1, 1, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6...
[ "nonn" ]
A078595
[ 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0...
[ "nonn" ]
A181185
[ 1, 2, 3, 6, 17, 25, 40, 45, 143, 289, 510, 524, 526, 716, 756, 1008, 1271, 1370, 3677, 7963, 9053 ]
[ "more", "nonn" ]
A313672
[ 1, 5, 10, 15, 17, 22, 31, 38, 45, 48, 51, 53, 62, 71, 76, 81, 86, 89, 93, 100, 111, 110, 113, 118, 127, 133, 138, 147, 148, 151, 158, 165, 173, 172, 179, 180, 189, 198, 203, 209, 210, 217, 220, 227, 238, 237, 241, 242, 2...
[ "nonn" ]
A132617
[ 1, 1, 3, 25, 378, 8460, 252087, 9392890, 420142350, 21927528948, 1307723670020, 87712176219801, 6534001434836758, 535159878432210000, 47792303301224800000, 4.621416976280491e+21, 4.810200783817221e+23 ]
[ "nonn" ]
A153056
[ 2, 3, 7, 16, 32, 57, 93, 142, 206, 287, 387, 508, 652, 821, 1017, 1242, 1498, 1787, 2111, 2472, 2872, 3313, 3797, 4326, 4902, 5527, 6203, 6932, 7716, 8557, 9457, 10418, 11442, 12531, 13687, 14912, 16208, 17577, 19021, 20542, 22142, 23...
[ "nonn", "easy" ]
A049256
[ 1, 9, 5, 1, 3, 3, 5, 9, 8, 7, 6, 5, 1, 3, 2, 1, 0, 17, 17, 5, 17, 10, 5, 12, 8, 9, 5, 5, 3, 2, 17, 9, 8, 17, 13, 9, 5, 1, 17, 17, 11, 17, 13, 17, 5, 11, 2, 17, 13, 17, 17, 1, 15, 11, 2, 12, 5, 10, 9, ...
[ "nonn" ]
A341204
[ 1, 7, 28, 84, 210, 462, 924, 1716, 3003, 4998, 7966, 12222, 18123, 26054, 36408, 49560, 65835, 85470, 108591, 135163, 164976, 197632, 232547, 268968, 306005, 342678, 377979, 410914, 440630, 466417, 487788, 504511, 516621, 524412, 528409, 529320, ...
[ "nonn", "base" ]
A209810
[ 930, 25505, 712829, 20873080, 617966001, 18479672376, 555404234236, 16753667272666, 506554692545247, 15340795715678712, 465100426878385200, 14111522453360462000, 428376408597707800000, 1.300862038843862e+22 ]
[ "nonn" ]
A383868
[ 1, 2, 6, 20, 70, 252, 904, 3152, 10560, 33920, 104704, 311808, 899584, 2524160, 6912000, 18526208, 48726016, 126025728, 321126400, 807403520, 2005794816, 4929093632, 11994136576, 28924968960, 69185044480, 164240556032, 387201368064, 907009851392, 2112083722240...
[ "nonn", "easy" ]
A273032
[ 1, 10, 590, 87730, 24386030, 10896056050, 7140660673070, 6452172716731570, 7688003030273050000, 1.1679689713099592e+22, 2.2034907735675944e+25, 5.054166520004098e+28, 1.3851122139937615e+32, 4.4698675066253244e+35, 1.6776941120065735e+39, 7.246501185695515e+42 ]
[ "nonn" ]
A182252
[ 4, 5, 14, 45, 180, 905, 5466, 38297, 306376, 2757393, 27574030, 303314341, 3639772188, 47317038457, 662438538482, 9936578077425, 158985249238800, 2702749237059617, 48649486267073430, 924340239074395100, 18486804781487903000 ]
[ "base", "nonn" ]
A174662
[ 1, 3, 8, 24, 88, 400, 2212, 14500, 110116, 951076, 9205156, 98646436, 1159016356, 14808626596, 204358994596, 3028436306596, 47955883346596, 807990334802596, 14430691329362596, 272302801683794600, 5412861968581971000 ]
[ "nonn", "easy" ]
A106896
[ 3, 17, 37, 79, 149, 241, 251, 271, 347, 383, 397, 653, 659, 661, 769, 773, 811, 863, 1019, 1061, 1097, 1109, 1123, 1187, 1249, 1297, 1303, 1459, 1559, 1567, 1583, 1601, 1607, 1619, 1663, 1847, 1901, 1931, 2011, 2143, 2243, 2281, 230...
[ "nonn", "easy" ]
A202231
[ 1, 2, 6, 24, 119, 708, 4914, 38980, 347862, 3449292, 37622348, 447662376, 5770553184, 80106726784, 1191471740436, 18902847341664, 318639524995160, 5687162644422552, 107145206713313550, 2124840033683212500, 44245492380155410000, 965195327390976400000 ]
[ "nonn" ]
A132958
[ 1, 1, 7, 11, 121, 479, 5041, 18479, 423361, 1844639, 39916801, 298710719, 6227020801, 43606442879, 1536517382401, 9589093113599, 355687428096001, 4259374594675199, 121645100408832000, 1135353600039859200 ]
[ "easy", "nonn" ]
A313906
[ 1, 5, 10, 16, 22, 26, 31, 36, 41, 47, 53, 58, 63, 68, 72, 78, 84, 89, 94, 99, 104, 110, 116, 120, 125, 130, 135, 141, 147, 152, 157, 162, 166, 172, 178, 183, 188, 193, 198, 204, 210, 214, 219, 224, 229, 235, 241, 246, 25...
[ "nonn" ]
A307245
[ 11, 1, 3, 10, 27, 60, 72, 120, 180, 270, 480, 252, 1155, 720, 792, 1260, 630, 1050, 4590, 1680, 1320, 7980, 3780, 4680, 5880, 5040, 5460, 4620, 9180, 10080, 10710, 6930, 9240, 7560, 21420, 20790, 27300, 52080, 15120, 13860, 48510, 239...
[ "nonn" ]
A190257
[ 2, 3, 1, 2, 5, 2, 1, 5, 95, 1, 1, 2, 1, 9, 3, 1, 1, 53, 1, 1, 1, 2, 3, 1, 7, 5, 1, 3, 8, 1, 5, 4, 1, 18, 1, 1, 6, 2, 25, 3, 5, 1, 5, 2, 4, 2, 1, 1, 43, 1, 1, 8, 1, 24, 3, 21, 1, 7, 4, 1, 13, 2, ...
[ "nonn", "cofr" ]
A205839
[ 2, 4, 2, 6, 12, 10, 8, 20, 18, 16, 8, 32, 26, 54, 52, 50, 42, 34, 88, 86, 84, 76, 68, 34, 142, 136, 110, 232, 230, 228, 220, 212, 178, 144, 376, 374, 372, 364, 356, 322, 288, 144, 608, 602, 576, 466, 986, 984, 982, 974...
[ "nonn" ]
A219120
[ 1, 1, 1, -1, 1, 5, -2, -2, 1, 1, 15, 13, -19, 3, 3, -1, 1, 37, 128, -26, -74, 46, -4, -4, 1, 1, 83, 679, 755, -654, -68, 230, -90, 5, 5, -1, 1, 177, 2866, 9048, 2091, -5741, 1856, 498, -545, 155, -6, -6, 1, 1, 367, ...
[ "sign", "tabf" ]
A291198
[ 1, 1, -4, 44, -704, 14208, -338304, 9165696, -276371712, 9139825152, -328127311872, 12691848990720, -525849764782080, 23229272756912130, -1089877362984222700, 54133294598753210000, -2.8382560940095e+21, 1.566855545174735e+23, -9.086394132461874e+24, 5.5235660956687604e+26, -3...
[ "sign" ]
A096188
[ 1, 3, 3, 7, 13, 14, 14, 27, 27, 46, 99, 549, 913, 2637, 3830, 3929, 15500, 55253, 85854, 246166, 1052057, 2490138, 2521393, 16086534, 29730193, 38774343, 84328391, 317160458, 371478595, 600277187, 811735945, 849656112, 139143919171 ]
[ "nonn" ]
A134169
[ 1, 2, 7, 29, 121, 497, 2017, 8129, 32641, 130817, 523777, 2096129, 8386561, 33550337, 134209537, 536854529, 2147450881, 8589869057, 34359607297, 137438691329, 549755289601, 2199022206977, 8796090925057, 35184367894529 ]
[ "nonn", "easy" ]
A123558
[ 2, 18, 1350, 24806250, 94588417300781250, 1.178493240699218e+38, 5.27608657124852e+83 ]
[ "easy", "nonn" ]
A240512
[ 1, 3, 10, 99, 1376, 37624, 1906245, 180760099, 31517059634, 10196460883584 ]
[ "nonn" ]
A073174
[ 0, 1, 1, 2, 2, 2, 3, 3, 4, 5, 5, 5, 7, 7, 9, 10, 7, 8, 11, 10, 14, 15, 11, 12, 16, 15, 18, 21, 18, 18, 25, 22, 29, 32, 21, 21, 23, 23, 30, 34, 27, 23, 34, 34, 41, 48, 30, 27, 41, 37, 41, 48, 43, 45, 59, 54,...
[ "easy", "nonn" ]
A105300
[ 1.1781116281147612e+39, 7.79376778128777e+47, 8.521658508608496e+47 ]
[ "base", "nonn", "bref" ]
A322986
[ 1, 2, 2, 3, 2, 4, 2, 4, 3, 4, 2, 6, 2, 4, 4, 5, 2, 6, 2, 6, 4, 4, 2, 8, 3, 4, 4, 5, 2, 8, 2, 6, 4, 4, 4, 9, 2, 4, 4, 8, 2, 8, 2, 6, 6, 4, 2, 10, 3, 6, 4, 6, 2, 8, 4, 7, 4, 4, 2, 12, 2, 4, 6, ...
[ "nonn" ]
A218747
[ 0, 1, 45, 1981, 87165, 3835261, 168751485, 7425065341, 326702875005, 14374926500221, 632496766009725, 27829857704427900, 1224513738994827500, 53878604515772420000, 2.3706585986939864e+21, 1.043089783425354e+23, 4.589595047071558e+24, 2.019421820711485e+26 ]
[ "nonn", "easy" ]
A300302
[ 1, 2, 2, 3, 4, 3, 4, 6, 5, 4, 5, 8, 7, 6, 5, 6, 10, 9, 11, 8, 6, 7, 12, 11, 12, 12, 9, 7, 8, 14, 13, 13, 16, 13, 10, 8, 9, 16, 15, 14, 20, 17, 14, 11, 9, 10, 18, 17, 23, 22, 21, 18, 15, 12, 10, 11, 20, ...
[ "nonn", "base", "tabl" ]
A279237
[ 2, 11, 3, 20, 101, 12, 1001, 110, 4, 21, 102, 1010, 10001, 13, 200, 100001, 30, 1002, 111, 5, 10010, 1000001, 1100, 22, 10000001, 100010, 103, 1011, 10002, 120, 100000001, 14, 2000, 201, 1000010, 100002, 31, 10100, 1003, 10000010, 10000...
[ "nonn", "base" ]
A242296
[ 216, 729, 2197, 2744, 5832, 6859, 15625, 19683, 21952, 59319, 64000, 68921, 85184, 97336, 117649, 185193, 300763, 474552, 551368, 658503, 729000, 778688, 804357, 970299, 1000000, 1092727, 1295029, 1481544, 1520875, 1860867, 1953125, 2197000, 2299968, ...
[ "nonn", "easy" ]
A082977
[ 0, 1, 3, 5, 6, 8, 10, 12, 13, 15, 17, 18, 20, 22, 24, 25, 27, 29, 30, 32, 34, 36, 37, 39, 41, 42, 44, 46, 48, 49, 51, 53, 54, 56, 58, 60, 61, 63, 65, 66, 68, 70, 72, 73, 75, 77, 78, 80, 82, 84, 85, 87, 89, 90, ...
[ "nonn", "easy" ]
A336435
[ 1, 3, 2, 4, 14, 6, 16, 63, 20, 18, 12, 64, 102, 66, 24, 40, 100, 208, 112, 36, 650, 444, 200, 198, 228, 160, 84, 72, 96, 60, 1610, 320, 1110, 192, 1218, 324, 400, 728, 462, 144, 280, 264, 270, 168, 120, 882, 828, 468, 98...
[ "nonn" ]
A368217
[ 2, 9, 28, 81, 176, 15625, 288, 6561, 1792, 137781, 17920, 244140625, 30720, 7971615, 311296, 43046721, 1492992, 3814697265625, 2752512, 3486784401, 38797312, 242137805625, 28311552, 59604644775390620, 184549376, 51684605176023, 2583691264, 63546645708225, 9512...
[ "nonn" ]
A201965
[ 101, 103, 107, 109, 1033, 10111, 10333, 101111, 103333, 107777, 10333333, 101111111, 103333333, 1033333333, 10999999999, 101111111111, 1099999999999, 10333333333333, 101111111111111100, 1100000000000000000, 10333333333333334000 ]
[ "nonn", "base", "less" ]
A319816
[ 1, 0, 1, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 2, 4, 4, 5, 3, 5, 4, 6, 6, 4, 7, 6, 8, 7, 7, 7, 8, 10, 7, 10, 10, 10, 10, 11, 10, 12, 13, 12, 13, 14, 14, 14, 16, 14, 16, 16, 14, 20, 19, 18, 17, 21,...
[ "nonn" ]
A269381
[ 0, 1, 2, 2, 3, 3, 3, 4, 5, 5, 5, 5, 6, 6, 6, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, ...
[ "nonn" ]
A187439
[ 24995294, 73023484028, 215547981233289, 638715674028172900, 1.890619227290921e+21 ]
[ "nonn" ]
A034695
[ 1, 6, 6, 21, 6, 36, 6, 56, 21, 36, 6, 126, 6, 36, 36, 126, 6, 126, 6, 126, 36, 36, 6, 336, 21, 36, 56, 126, 6, 216, 6, 252, 36, 36, 36, 441, 6, 36, 36, 336, 6, 216, 6, 126, 126, 36, 6, 756, 21, 126, 36, 126, 6, ...
[ "nonn", "mult" ]
A024327
[ 0, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 2, 2, 1, 2, 2, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 4, 3, 4, 4, 4, 4, 3, 4, 4, 3, 4, 4, 3, 5, 5, 5, 4, 5, 5, 5, 5, 4, 5, 5, 5, 5, 6, 5, 6, 6, 5, 6, 6, 5, 5, 6, 6, 5...
[ "nonn" ]
A234055
[ 16488, 367857, 8226630, 184027176, 4114129859, 91973148874, 2055997586633, 45960182004045, 1027397134713634, 22966489726843436, 513393765537961500, 11476422031054555000, 256544314398972400000, 5.734799925438397e+21 ]
[ "nonn" ]
A333092
[ 1, 7, 109, 1951, 36993, 724007, 14457421, 292732671, 5987886081, 123440423047, 2560421160109, 53373725431583, 1117198199782785, 23465732683090470, 494330214846965400, 10440064992542622000, 220978578227187100000, 4.686426367646859e+21, 9.955927003696852e+22 ]
[ "nonn", "easy" ]
A019632
[ 3, 5, 5, 8, 2, 2, 2, 5, 9, 2, 7, 8, 0, 6, 5, 2, 9, 4, 3, 9, 4, 3, 1, 4, 6, 1, 9, 5, 6, 4, 4, 4, 0, 6, 0, 3, 9, 5, 9, 7, 8, 7, 0, 2, 2, 3, 2, 3, 5, 4, 6, 4, 5, 6, 7, 4, 4, 9, 8, 3, 3, 8, 0, 4...
[ "nonn", "cons" ]
A096336
[ 0, 0, 0, 1, 1, 1, 2, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 10, 11, 12, 13, 14, 15, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45...
[ "easy", "nonn" ]
A254463
[ 56, 126, 378, 1386, 5778, 26226, 126378, 636426, 3314178, 17714466, 96660378, 536249466, 3015243378, 17141522706, 98333399178, 568324150506, 3305074833378, 19319850386946, 113420243462778, 668241096915546, 3948892688324178, 23393955029043184, 138880128205091180 ]
[ "nonn", "easy" ]
A020808
[ 1, 4, 0, 0, 2, 8, 0, 0, 8, 4, 0, 2, 8, 0, 0, 9, 8, 0, 3, 5, 2, 9, 2, 9, 4, 0, 8, 0, 6, 6, 0, 2, 4, 8, 0, 9, 3, 8, 7, 5, 7, 1, 9, 8, 3, 5, 2, 7, 5, 0, 4, 5, 8, 4, 9, 6, 4, 8, 7, 1, 1, 9, 3, 7...
[ "nonn", "cons", "easy" ]
A033989
[ 0, 3, 1, 1, 3, 2, 7, 9, 1, 1, 6, 9, 4, 7, 9, 1, 2, 1, 2, 1, 6, 7, 4, 3, 6, 1, 2, 9, 5, 1, 1, 0, 9, 3, 1, 3, 6, 6, 1, 8, 6, 9, 2, 5, 0, 2, 2, 4, 6, 6, 2, 5, 6, 0, 3, 8, 9, 5, 3, 3, 6, 9, 4, 0...
[ "nonn", "base", "easy", "nice" ]
A183519
[ 3, 9, 31, 95, 309, 911, 2803, 8673, 26619, 81959, 252477, 777327, 2393627, 7371657, 22698115, 69895583, 215235669, 662786215, 2040959827, 6284869089, 19353386043, 59596135287, 183518286189, 565119695167, 1740209766219, 5358741068409 ]
[ "nonn" ]
A154863
[ 13, 23, 47, 53, 61, 79, 83, 89, 103, 107, 151, 179, 181, 197, 227, 257, 277, 281, 283, 311, 313, 331, 347, 353, 389, 409, 569, 601, 607, 631, 643, 647, 653, 701, 709, 739, 743, 761, 769, 797, 821, 823, 827, 829, 857, 859, 87...
[ "nonn", "base", "less" ]
A114986
[ 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1...
[ "nonn", "easy" ]
A137228
[ 3, 5, 7, 9, 11, 12, 14, 16, 18, 19, 21, 23, 24, 26, 28, 29, 31, 33, 34, 36, 38, 39, 41, 42, 44, 46, 47, 49, 51, 52, 54, 55, 57, 59, 60, 62, 63, 65, 67, 68, 70, 71, 73, 75, 76, 78, 79, 81, 83, 84, 86, 87, 89, 90...
[ "nonn" ]
A344068
[ 1, 1, 9, 90, 810, 8019, 72900, 715149, 6495390, 63772920, 579270690, 5643903420, 51613018479, 499772430810, 4567687565310, 44250780833091, 404188047763920, 3894703308072990, 35764052204589030, 342923118899865400, 3146016498406236700, 30187757787717435000, 2768430692346539...
[ "nonn" ]
A306533
[ 1, 1, 4, 1, 3, 9, 1, 2, 5, 16, 1, 2, 3, 8, 25, 1, 2, 3, 5, 10, 36, 1, 2, 3, 4, 6, 14, 49, 1, 2, 3, 4, 5, 7, 16, 64, 1, 2, 3, 4, 5, 6, 8, 20, 81, 1, 2, 3, 4, 5, 6, 7, 10, 23, 100, 1, 2, 3, 4, 5, 6,...
[ "nonn", "tabl" ]
A052815
[ 0, 1, 2, 5, 16, 56, 221, 900, 3839, 16752, 74701, 338327, 1553181, 7208191, 33768389, 159463655, 758291989, 3627890869, 17450572584, 84342086908, 409394388458, 1994883122360, 9754673396640, 47850963112328, 235413886888082, 1161267995487057, 5742484341773444 ]
[ "easy", "nonn" ]
A107211
[ 2, 47, 79, 97, 431, 439, 521, 761, 769, 929, 1193, 1223, 1297, 1303, 1399, 1481, 1567, 1753, 1823, 1847, 2143, 2311, 2503, 2591, 2633, 2753, 2857, 3089, 3271, 3361, 3623, 3761, 3767, 3919, 4007, 4049, 4217, 4481, 4703, 5407, 5503, 568...
[ "nonn", "easy" ]
A090295
[ 0, 1, 0, -1, 1, -1, 1, -17, 41, -3359, 1319, -234061, 77141, -25222469, 113513, -775879541, 964485937, -6450310315, 178425130799, -217586071308601, 2282867060899, -4350162631605877, 13410469018835100, -30904230668771780000, 1713176573537644500, -3.114541600222419e+2...
[ "sign", "frac" ]
A226358
[ 0, 0, 12, 456, 63264, 33261504, 68578235904, 562670659193856, 18444482155274686000, 2.4177777585647414e+24, 1.2676409253397386e+30, 2.6584509204542743e+36, 2.2300734564407397e+43 ]
[ "nonn" ]
A135921
[ 1, 1, 3, 13, 81, 669, 6955, 88505, 1346209, 23998521, 493956467, 11596542533, 307301505073, 9110471500693, 299893197116059, 10888674034993904, 433549376981078600, 18833037527449400000, 888439543634687700000 ]
[ "nonn" ]
A320666
[ 0, 2, 6, 9, 14, 22, 29, 38, 51, 61, 74, 92, 105, 122, 145, 161, 182, 210, 229, 254, 287, 309, 338, 376 ]
[ "nonn", "more" ]
A198979
[ 15, 8731, 12662226, 19622872903, 30525244435834, 47495195899845040, 73900197917712350000, 1.1498516915574315e+23, 1.789114242885657e+26, 2.7837762079046086e+29 ]
[ "nonn" ]
A154715
[ 1, 2, 3, 4, 18, 16, 8, 81, 192, 125, 16, 324, 1536, 2500, 1296, 32, 1215, 10240, 31250, 38880, 16807, 64, 4374, 61440, 312500, 699840, 705894, 262144, 128, 15309, 344064, 2734375, 9797760, 17294403, 14680064, 4782969 ]
[ "easy", "nonn", "tabl" ]
A155668
[ 1, 4, 58, 820, 10546, 128284, 1509418, 17390020, 197581666, 2223729964, 24863682778, 276721736020, 3069708899986, 33972956330044, 375351787072138, 4142063797326820, 45668254886861500, 503195228685608500 ]
[ "nonn", "easy" ]
A213091
[ 1, 1, 1, 2, 4, 11, 31, 98, 317, 1070, 3685, 12928, 45924, 164552, 593398, 2148288, 7796846, 28328601, 102948125, 373955584, 1357252616, 4921292287, 17828236695, 64546901169, 233660589210, 846258569786, 3068523234989, 11147449003438, 40600425590874, 148330067...
[ "sign" ]
A026711
[ 1, 1, 4, 6, 20, 32, 101, 165, 507, 837, 2531, 4205, 12583, 20993, 62368, 104354, 308438, 517146, 1522818, 2557110, 7508968, 12623188, 36990948, 62237324, 182092022, 306566670, 895859156, 1508992496, 4405521688, 7423506680 ]
[ "nonn" ]
A169768
[ 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 24, 0, 24, 0, 276, 0, 176, 0, 2604, 0, 1876, 0, 25736, 0, 17384, 0, 248816, 0, 173064, 0, 2424608, 0, 1668712, 0, 23581056, 0, 16317480, 0, 229513584, 0, 158435296, 0, 2233386048, 0, 1543447264, 0...
[ "nonn" ]
A386807
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 5...
[ "nonn", "easy" ]
A119726
[ 1, 1, 1, 1, 6, 1, 1, 16, 26, 1, 1, 36, 116, 106, 1, 1, 76, 376, 676, 426, 1, 1, 156, 1056, 2856, 3556, 1706, 1, 1, 316, 2736, 9936, 18536, 17636, 6826, 1, 1, 636, 6736, 30816, 76816, 109416, 84196, 27306, 1, 1, 1276, 16016...
[ "easy", "nonn", "tabl" ]
A258169
[ 1, 2, 16, 32768, 72057594037927940, 8.22752278660603e+62 ]
[ "nonn", "easy" ]
A045474
[ 4, 8, 14, 24, 42, 76, 138, 254, 470, 876, 1638, 3070, 5766, 10850, 20436, 38550, 72806, 137670, 260612, 493824, 936690, 1778360, 3379372, 6427190, 12232928, 23300652, 44414366, 84713872, 161686324, 308780220 ]
[ "nonn", "changed" ]
A258762
[ 1, 2, 0, 0, 2, 0, 7, 6, 1, 3, 7, 1, 0, 5, 5, 3, 0, 0, 1, 7, 5, 5, 0, 4, 8, 8, 8, 6, 3, 9, 1, 9, 2, 7, 6, 1, 4, 8, 3, 4, 4, 8, 9, 2, 5, 0, 4, 4, 3, 0, 1, 4, 6, 8, 9, 8, 2, 1, 6, 8, 9, 5, 1, 9...
[ "nonn", "cons", "easy" ]
A037137
[ 23, 43, 51, 56, 69, 75, 77, 87, 93, 99, 107, 111, 123, 147, 159, 177, 183, 205, 219, 223, 227, 231, 235, 253, 267, 271, 285, 291, 295, 299, 301, 303, 317, 327, 349, 357, 363, 379, 391, 399, 405, 411, 447, 457, 465, 467, 471,...
[ "nonn" ]
A370474
[ 1, 2, 9, 54, 372, 2778, 21873, 178786, 1502649, 12904524, 112741664, 998871030, 8953443276, 81047485148, 739846170864, 6803054508702, 62954736555836, 585850907166084, 5479077065774682, 51470699845616000, 485456696541512450, 4595280949098247000 ]
[ "nonn" ]
A340042
[ 5, 10, 17, 24, 26, 33, 37, 44, 50, 57, 63, 65, 72, 76, 82, 89, 91, 101, 108, 122, 127, 129, 145, 148, 152, 164, 170, 171, 177, 185, 196, 197, 204, 208, 223, 226, 233, 252, 257, 260, 264, 269, 283, 289, 290, 294, 297, 316, ...
[ "nonn" ]
A004102
[ 1, 1, 3, 10, 66, 792, 25506, 2302938, 591901884, 420784762014, 819833163057369, 4382639993148435500, 6.458813353218572e+22, 2.638572375815763e+27, 3.004002080940641e+32, 9.577689246703567e+37 ]
[ "nonn", "nice", "easy" ]
A051037
[ 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100, 108, 120, 125, 128, 135, 144, 150, 160, 162, 180, 192, 200, 216, 225, 240, 243, 250, ...
[ "easy", "nonn", "changed" ]
A062633
[ 3, 5, 43, 2399, 88037 ]
[ "nonn", "hard" ]
A018400
[ 1, 2, 13, 26, 169, 338 ]
[ "nonn", "fini", "full", "easy" ]
A246164
[ 1, 2, 4, 11, 8, 5, 3, 7, 6, 9, 13, 17, 47, 31, 14, 61, 21, 42, 185, 24, 87, 319, 62, 12, 25, 19, 10, 59, 20, 15, 37, 229, 49, 22, 67, 76, 415, 103, 28, 18, 55, 137, 34, 41, 16, 27, 97, 78, 425, 109, 29, 1627, 222...
[ "nonn" ]
A374052
[ 1, 6, 8, 10, 21, 22, 26, 27, 28, 35, 36, 38, 45, 48, 51, 58, 60, 64, 68, 69, 74, 75, 77, 80, 85, 86, 91, 92, 93, 98, 99, 100, 106, 115, 117, 118, 122, 123, 124, 125, 126, 132, 133, 134, 141, 155, 156, 162, 164, 165, ...
[ "nonn" ]
A040200
[ 14, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 28, 1, 1, 1, 2...
[ "nonn", "cofr", "easy", "mult" ]
A199751
[ 2, 17, 182, 1997, 21962, 241577, 2657342, 29230757, 321538322, 3536921537, 38906136902, 427967505917, 4707642565082, 51784068215897, 569624750374862, 6265872254123477, 68924594795358240, 758170542748940700, 8339875970238347000 ]
[ "nonn", "easy" ]
A195662
[ -3, 2, 0, 2, 0, 3, 2, 0, 1, 0, 2, 0, -1, 0, -3, 2, 0, -3, 0, -4, 0, 2, 0, -5, 0, -3, 0, 3, 2, 0, -7, 0, 0, 0, 7, 0, 2, 0, -9, 0, 5, 0, 10, 0, -3, 2, 0, -11, 0, 12, 0, 10, 0, -10, 0, 2, 0, -13, 0, 21...
[ "sign", "tabl", "easy" ]
A362293
[ 1, 1, 1, 1, 9, 41, 121, 2241, 18481, 91729, 2577681, 30833441, 215554681, 8126363961, 127462383049, 1150296157921, 54416525377761, 1056352067669921, 11684649751431840, 665061201610232800, 15390714465319911000, 201615391902487800000 ]
[ "nonn" ]
A254500
[ 0, 7, 17, 70, 111, 258, 689, 454, 7133, 15977, 82869, 111044, 536687, 384769, 2750561, 7063105 ]
[ "nonn", "more", "base" ]
A053957
[ 4, 64, 676, 7744, 4444667464644, 66667767777644765000, 7.676466647774677e+23, 6.446477674444767e+24, 7.446477664767777e+30, 6.444647444474665e+34, 6.646766444664668e+47 ]
[ "nonn", "base", "more" ]
A179325
[ 1, 1, 3, 12, 59, 331, 2062, 13945, 100981, 775099, 6260336, 52914052, 466062718, 4263629043, 40404127710, 395772643255, 4000017157615, 41650278419675, 446222379390064, 4913287373304033, 55545290608129180, 644152152145611600 ]
[ "nonn" ]
A188657
[ 1, 4, 4, 3, 0, 0, 0, 4, 6, 8, 1, 6, 4, 6, 9, 1, 3, 9, 5, 9, 8, 3, 9, 5, 6, 0, 4, 0, 7, 7, 9, 9, 6, 3, 3, 0, 4, 3, 2, 4, 3, 0, 6, 9, 1, 6, 1, 9, 1, 6, 6, 0, 2, 8, 0, 2, 3, 8, 5, 8, 1, 4, 0, 6...
[ "nonn", "cons", "easy" ]
A239044
[ 90, 6524, 432705, 28827920, 1916936295, 126785422189, 8374355016629, 552972642874139, 36495962765384250, 2408028908123415000, 158867999243856670000, 1.048060933758317e+22, 6.913835589216856e+23 ]
[ "nonn" ]
A050112
[ 1, 6, 36, 9, 2, 12, 3, 18, 4, 24, 144, 864, 216, 54, 13, 78, 19, 114, 28, 7, 42, 10, 60, 15, 90, 22, 5, 30, 180, 45, 11, 66, 16, 96, 576, 3456, 20736, 5184, 1296, 324, 81, 20, 120, 720, 4320, 1080, 270, 67, 402, 100, ...
[ "nonn" ]
A224177
[ 84, 7056, 282372, 6425876, 95808564, 1038484760, 8857798353, 63080505999, 391482575333, 2182020084219, 11154302333669, 53070835890575, 237508827855216, 1007614860280386, 4076458517196412, 15801076345180104, 58906922067133096, 211885437690782800, 737309735186246000 ]
[ "nonn" ]
A271169
[ 1, 1, 2, 2, 3, 4, 4, 6, 5, 7, 6, 7, 7, 6, 8, 6, 8, 6, 7, 7, 6, 8, 6, 8, 6, 7, 7, 6, 7, 5, 6, 4, 5, 4, 3, 4, 3, 4, 3, 4, 4, 4, 5, 4, 5, 4, 5, 5, 4, 5, 4, 5, 4, 5, 5, 4, 5, 4, 5, 4, 4, 4, 3, 3...
[ "nonn" ]
A128522
[ 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 2, 1, 1, 3, 3, 3, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 3, 3, 3, 3, 3, 2, 2, 1, 1, 2, 2, 2, 3, 2, 3, 2, 2, 1, 1 ]
[ "nonn", "tabl" ]
A334286
[ 1, 1, 2, 10, 465, 190131, 848597563, 43025433375905, 26004966055138636000, 1.9417331020406413e+26, 1.8434259996904143e+34, 2.277825748094692e+43, 3.7344456695885697e+53 ]
[ "nonn" ]