id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A096640
[ 23, 7, 31, 79, 631, 751, 2311, 21319, 48799, 82471, 256279, 78439, 1768831, 1365079, 2631511, 1427911, 4355311, 5715319, 49196359, 117678031, 180628639, 475477759, 452980999 ]
[ "nonn" ]
A153664
[ 1, 14, 163, 1256, 2677, 8093, 49304, 49305, 158643, 164000, 835999, 2242294, 2242295, 2242296, 3965133, 25380333, 92600006, 92600007, 92600008, 92600009, 92600010, 92600011, 99267816, 125040717, 125040718 ]
[ "nonn", "more" ]
A171556
[ 1, 1, 4, 13, 40, 124, 394, 1285, 4288, 14584, 50386, 176356, 624034, 2228698, 8023318, 29084533, 106073008, 388934368, 1432916098, 5301789568, 19692361258, 73398801058, 274447690918, 1029178840948, 3869712441970, 14585839204354 ]
[ "easy", "nonn" ]
A239411
[ 368, 113774, 32507376, 9402398952, 2671846338458, 765206237815409, 217822754771248130, 62224253930396430000, 1.7732860047914477e+22, 5.061141668045084e+24, 1.4430951466234736e+27 ]
[ "nonn" ]
A002509
[ 1, -1, 4, -5, 15, -19, 45, -52, 118, -137, 281, -316, 625, -695, 1331, -1444, 2696, -2907, 5308, -5640, 10122, -10650, 18845, -19628, 34241, -35378, 61036, -62524, 106783, -108593, 183799, -185646, 311625, -312800, 521232, -520044, 860728, -8...
[ "sign", "easy" ]
A245290
[ 1, 31, 5119, 9961471, 259577085951, 94554701453852670, 4.9421469185009304e+23, 3.774794821576248e+31, 4.269496028892835e+40, 7.2227336412029995e+50 ]
[ "nonn" ]
A085188
[ 0, 1, 3, 4, 7, 12, 13, 15, 16, 19, 27, 28, 31, 43, 60, 61, 63, 64, 67, 72, 73, 75, 76, 79, 87, 88, 91, 103, 132, 133, 135, 136, 139, 147, 148, 151, 163, 207, 208, 211, 223, 283, 360, 361, 363, 364, 367, 372, 373, 375, ...
[ "nonn" ]
A321286
[ 1, 0, 1, 1, 1, 2, 3, 3, 5, 6, 8, 10, 14, 16, 22, 28, 33, 43, 55, 64, 84, 102, 123, 153, 188, 224, 277, 335, 401, 486, 589, 695, 843, 1006, 1191, 1428, 1698, 1999, 2384, 2814, 3312, 3914, 4612, 5395, 6355, 7447, 8691, 10182...
[ "nonn" ]
A261620
[ 31, 536, 2684, 7795, 8482, 49009, 96339, 236060 ]
[ "more", "nonn" ]
A340513
[ 1, 1, 1, 1, 1, 5, 1, 1, 2, 3, 1, 9, 1, 3, 1, 2, 1, 13, 1, 1, 1, 3, 1, 7, 2, 3, 3, 1, 1, 10, 1, 2, 1, 3, 1, 23, 1, 3, 1, 7, 1, 9, 1, 7, 2, 3, 1, 7, 2, 1, 1, 1, 1, 24, 1, 1, 1, 3, 1, 17, 1, 3, 2...
[ "nonn" ]
A196527
[ 2, 5, 2, 1, 1, 1, 1, 1, 2, 1, 4, 1, 7, 1, 8, 1, 1, 1, 1, 1, 8, 7, 1, 1, 1, 3, 2, 1, 4, 3, 1, 1, 28, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 2, 1, 1, 1, 26, 1, 2, 1, 1, 1, 2, 1, 6, 1, 1, 1, 2, 1, 1, ...
[ "nonn" ]
A293883
[ 1, 3, 8, 20, 47, 106, 237, 522, 1146, 2485, 5406, 11644, 25157, 53964, 116003, 247987, 530999, 1131889, 2415431, 5135838, 10927816, 23182209, 49199697, 104154808, 220543306, 465996956, 984704338, 2076988457, 4380764354, 9225209588, 19424813915, 408445091...
[ "nonn" ]
A257207
[ 219706, 443711, 411303, 753005, 640929, 516615, 675943, 769789, 876597, 1089188, 1305183, 1551382, 1851722, 2195415, 2590158, 3029318, 3516086, 4063777, 4672716, 5347330, 6075568, 6871137, 7747708, 8708189, 9740806, 10853545, 12070515 ]
[ "nonn" ]
A224293
[ 0, 0, 0, 0, 0, 2, 32, 322, 2634, 19216, 130662, 848284, 5334332, 32788726, 198201268, 1183152686, 6995479542, 41055940756, 239560353258, 1391435203864, 8052418072728, 46464481278410, 267483032264168, 1536914425518970, 8817393642571330 ]
[ "nonn" ]
A213421
[ 1, 2, 1, -10, -47, -118, -143, 254, 2017, 6290, 11041, 134, -76751, -307942, -694511, -622450, 2371777, 13844258, 38774593, 58188566, -38667887, -561991510, -1977290831, -3975222754, -2059855199, 19587138482 ]
[ "sign", "easy" ]
A179524
[ 1, 1, -15, -143, 1, 12801, 100401, -555855, -16006143, -69903359, 1371541105, 20881151985, 5878439425, -2725373454335, -25310084063055, 145439041081137, 4851621446905857, 23952290336559104, -470461357757965060, -7793050905481343000, -4149447893184517000 ]
[ "sign" ]
A320308
[ 13, 247, 890970451, 5.408188191082437e+23, 7.712643592682621e+61 ]
[ "nonn", "base" ]
A321904
[ 1, 1, 3, 1, 3, 5, 7, 1, 3, 13, 7, 9, 11, 5, 15, 1, 19, 29, 7, 25, 27, 21, 15, 17, 3, 13, 23, 9, 11, 5, 31, 1, 51, 29, 7, 57, 59, 21, 15, 49, 3, 13, 23, 41, 11, 5, 31, 33, 19, 61, 39, 25, 27, 53, 47, 17, 3...
[ "nonn", "tabf" ]
A233927
[ 2500838, 171250610, 14257498880, 1445209360978, 161038431160850, 19149252827167936, 2356133940564872700, 296071347102693300000, 3.7626468096976116e+22, 4.814161800417109e+24 ]
[ "nonn" ]
A355194
[ 1, 1, 2, 4, 13, 41, 176, 722, 3774, 18958, 116302, 687182, 4812226, 32541874, 255274826, 1938568634, 16798483589, 141220228149, 1337121257864, 12305678519102, 126208299343263, 1260257489267963, 13901541357573146, 149520289244078180, 1763398965493327400 ]
[ "nonn" ]
A194754
[ 1, 2, 3, 4, 5, 6, 7, 1, 3, 5, 7, 9, 11, 13, 1, 4, 7, 10, 13, 16, 19, 1, 5, 9, 13, 17, 21, 25, 1, 6, 11, 16, 21, 26, 31, 1, 7, 13, 19, 25, 31, 37, 1, 8, 15, 22, 29, 36, 43, 1, 9, 17, 25, 33, 41, 49, 1, 1...
[ "nonn" ]
A167076
[ 1, 23, 506, 11132, 244904, 5387888, 118533536, 2607737792, 57370231424, 1262145091328, 27767192009216, 610878224202752, 13439320932460544, 295665060514131700, 6504631331310892000, 143101889288839510000 ]
[ "nonn" ]
A208165
[ 9, 81, 287, 981, 2920, 9039, 28681, 89623, 278652, 872602, 2730176, 8525256, 26645271, 83307020, 260355204, 813693708, 2543369350, 7949447810, 24845860649, 77657127110, 242721701342, 758634528231, 2371142647768, 7411113488204 ]
[ "nonn" ]
A227345
[ 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 2, 0, 0, 0, 1, 3, 0, 0, 0, 0, 1, 3, 1, 0, 0, 0, 0, 1, 3, 2, 0, 0, 0, 0, 0, 1, 5, 2, 0, 0, 0, 0, 0, 0, 1, 5, 4, 0, 0, 0, 0, 0, 0, 0, 1, 5, 6, 0, 0, 0, 0, 0, 0...
[ "nonn", "tabl" ]
A276613
[ 0, 7, 14, 21, 26, 33, 40, 47, 52, 59, 63, 70, 77, 84, 89, 96, 103, 110, 115, 124, 131, 138, 145, 150, 157, 164, 171, 176, 183, 187, 194, 201, 208, 215, 222, 229, 236, 241, 248, 255, 262, 267, 274, 278, 285, 292, 299, 304, ...
[ "nonn" ]
A348051
[ 4, 5, 3, 7, 9, 12, 2, 7, 11, 8, 3, 11, 16, 13, 20, 11, 7, 19, 17, 25, 15, 10, 13, 17, 16, 23, 27, 24, 7, 1, 13, 3, 5, 5, 19, 5, 11, 13, 4, 1, 8, 31, 29, 17, 28, 14, 17, 5, 4, 31, 39, 36, 23, 37, 48, 13, 2...
[ "nonn", "frac", "tabl" ]
A202570
[ 3525903, 116710359, 3960376543, 133595643125, 4416423552899, 146521400746907, 4884856784343255, 162753806260330140, 5417559503164734000, 180285965744987300000, 6.002130815063114e+21, 1.9982957001988014e+23 ]
[ "nonn" ]
A025582
[ 0, 1, 3, 7, 12, 20, 30, 44, 65, 80, 96, 122, 147, 181, 203, 251, 289, 360, 400, 474, 564, 592, 661, 774, 821, 915, 969, 1015, 1158, 1311, 1394, 1522, 1571, 1820, 1895, 2028, 2253, 2378, 2509, 2779, 2924, 3154, 3353, 3590, 3796, ...
[ "nonn" ]
A184392
[ 1, 2, 3, 8, 5, 36, 7, 64, 27, 10, 11, 144, 1, 14, 15, 64, 1, 324, 1, 40, 21, 484, 1, 1152, 5, 2, 27, 56, 1, 180, 1, 64, 1089, 2, 35, 1296, 1, 2, 3, 320, 1, 252, 1, 85184, 135, 2, 1, 1152, 7, 10, 3, 8, 1, 324, ...
[ "nonn", "base" ]
A238532
[ 0, 1, 1, 0, 1, 0, 2, 0, 0, 0, 2, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 0, 3, 0, 1, 0, 0, 0, 2, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 4, 0, 4, 0, 0, 0...
[ "nonn" ]
A097557
[ 1, 2, 3, 4, 6, 9, 13, 17, 21, 26, 32, 39, 47, 55, 64, 74, 85, 97, 109, 121, 134, 148, 163, 178, 194, 211, 228, 246, 265, 285, 306, 328, 351, 375, 400, 426, 453, 481, 510, 540, 571, 602, 634, 667, 701, 735, 770, 806, 843,...
[ "nonn" ]
A353653
[ 2, 3, 9, 10, 11, 12, 13, 14, 15, 21, 27, 33, 39, 45, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 93, 99, 1...
[ "nonn", "easy" ]
A162866
[ 39607, 278051, 339863, 341827, 402371, 519587, 735211, 919423, 1123219, 1191643, 1263239, 1329763, 1635547, 1648919, 1737863, 1994119, 2191687, 2465227, 2566279, 3025423, 3101743, 3197899, 3306731, 3719467, 4259243, 4466411, 4498883, 4591507, 4680503, 503186...
[ "nonn" ]
A072246
[ 1, 2, 3, 5, 15, 22 ]
[ "nonn" ]
A201868
[ 1, 3, 15, 45, 169, 643, 2509, 10129, 41031, 166337, 678169, 2772981, 11365437, 46717997, 192513137, 795049313, 3289962901, 13637608037, 56617168555, 235369429109, 979676940333, 4082222870535, 17027439214453, 71089263424863 ]
[ "nonn" ]
A163849
[ 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 33...
[ "nonn", "easy" ]
A131262
[ 1, 3, 14, 60, 248, 1008 ]
[ "hard", "more", "nonn" ]
A198338
[ 1, 1, 2, 1, 2, 3, 1, 2, 2, 4, 1, 2, 3, 5, 1, 2, 2, 3, 4, 6, 1, 2, 3, 3, 7, 1, 2, 2, 2, 4, 4, 4, 8, 1, 2, 2, 3, 3, 4, 6, 6, 9, 1, 2, 2, 3, 4, 5, 6, 10, 1, 2, 3, 5, 11, 1, 2, 2, 2, 3, 4, 4, 4, ...
[ "nonn", "tabf" ]
A367287
[ 1, 2, 4, 62, 80, 122, 136, 658, 1918, 2998, 3404, 4042, 5678, 8378, 10438, 23530, 24610, 29090, 41650, 120818 ]
[ "nonn", "more" ]
A147579
[ 255255, 765765, 1276275, 1786785, 2297295, 2807805, 3318315, 3828825, 4339335, 5360355, 6381375, 6891885, 8423415, 8933925, 9954945, 11486475, 12507495, 13018005, 14039025, 16081065, 16591575, 19144125, 19654635, 20675655, 21696675, 23228205, 25270245, 26801775 ...
[ "nonn" ]
A198471
[ 20, 30, 42, 66, 70, 78, 88, 102, 104, 114, 138, 150, 174, 186, 210, 220, 222, 246, 258, 260, 272, 282, 294, 304, 308, 318, 330, 340, 354, 364, 366, 368, 380, 390, 402, 426, 438, 450, 460, 462, 464, 474, 476, 498, 510, 532, 5...
[ "nonn" ]
A025301
[ 138125, 160225, 204425, 226525, 235625, 276250, 292825, 300625, 308125, 320450, 333125, 337025, 348725, 359125, 386425, 393125, 403325, 408850, 416585, 430625, 435625, 453050, 456025, 469625, 471250, 491725, 493025, 495625, 499525, 505325 ]
[ "nonn" ]
A225215
[ 1, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 8, 9, 9, 10, 11, 11, 12, 12, 13, 13, 14, 15, 15, 16, 16, 17, 17, 18, 19, 19, 20, 20, 21, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 28, 29, 30, 30, 31, 31, 32,...
[ "nonn", "easy" ]
A287029
[ 1, 3, 13, 147, 1965, 30979, 559357, 11289219, 250794109, 6066778627, 158533572861, 4447703062787, 133309656009469, 4251322261512195, 143749952968507400, 5137921526511802000, 193589838004887200000, 7.670544451820808e+21, 3.1889286784448426e+23, 1.3881730766388537e+25 ]
[ "nonn" ]
A133509
[ 0, 105, 164, 186, 194, 206, 216, 231, 254, 282, 285, 302, 314, 324, 374, 386, 402, 416, 456, 468, 491, 504, 521, 552, 588, 606, 610, 615, 629, 651, 656, 657, 696, 759, 794, 830, 842, 854, 870, 903, 906, 954, 956, 981, 998, 102...
[ "nonn", "base" ]
A269335
[ 1, 14, 852, 152922, 62038644, 47286888510, 60138461300848 ]
[ "nonn" ]
A144021
[ 1, 2, 1, 1, 2, 3, 2, 1, 6, 6, 1, 2, 3, 12, 15, 2, 1, 6, 6, 30, 33, 1, 2, 3, 12, 15, 66, 78, 2, 1, 6, 6, 30, 33, 156, 177, 1, 2, 3, 12, 15, 66, 78, 354, 411, 2, 1, 6, 6, 30, 33, 156, 177, 822, 942 ]
[ "nonn" ]
A357989
[ 0, 3, 6, 9, 15, 24, 29, 43, 58, 53, 18, 68, 298, 399, 71, 373, 2628, 444, 768, 2304, 6144, 2631, 441, 3072, 1604, 10684, 33348, 1212, 3908, 11452, 836, 3075, 1209, 43264, 98304, 33351, 3513, 1607, 10681, 1675, 3001, 44476, 4676, 1...
[ "nonn", "base" ]
A184051
[ 1, 1, 1, 2, 2, 1, 5, 4, 3, 1, 13, 6, 6, 4, 1, 30, 10, 10, 10, 5, 1, 66, 14, 15, 20, 15, 6, 1, 137, 22, 21, 35, 35, 21, 7, 1 ]
[ "nonn", "easy", "tabl" ]
A323552
[ 4, 16, 128, 512, 6144, 98304, 393216, 9437184, 37748736, 1207959552, 43486543872, 1739461754880, 6957847019520, 333976656936960, 1335906627747840, 80154397664870400, 4809263859892224000, 19237055439568896000, 1.3850679916489605e+21, 9.972489539872516e+22 ]
[ "nonn", "frac" ]
A176670
[ 1111, 1255, 12955, 17482, 25105, 28174, 51295, 81229, 91365, 100255, 101299, 105295, 107329, 110191, 110317, 117067, 124483, 127417, 129595, 132565, 137281, 145273, 146137, 149782, 163797, 171735, 174082, 174298, 174793, 174982, 193117, 208174, 210181,...
[ "nonn", "base" ]
A359458
[ 0, 2, 18, 180, 2640, 59280, 2096640, 118067040, 10659448800, 1548438091200, 362727075110400, 137200338475200000, 83862700757150520000, 8.287648643081231e+22, 1.324563978791906e+26, 3.424312624830972e+29, 1.4321287046666052e+33 ]
[ "nonn", "easy" ]
A221140
[ 0, 1, 5, 15, 35, 75, 140, 259, 435, 735, 1155, 1841, 2765, 4200, 6125, 8975, 12731, 18179, 25235, 35180, 48055, 65681, 88299, 118895, 157690, 209230, 274510, 359779, 466970, 605740, 778860, 1000462, 1276044, 1624845, 2056355, 2598855, 3265851, ...
[ "nonn" ]
A162657
[ 1, 2, 3, 4, 5, 18, 7, 8, 9, 20, 11, 48, 13, 112, 45, 16, 17, 468, 19, 480, 21, 88, 23, 72, 25, 52, 27, 196, 29, 180, 31, 32, 99, 68, 35, 36, 37, 152, 39, 80, 41, 1344, 43, 176, 810, 368, 47, 192, 49, 50, 459, 104, ...
[ "nonn" ]
A079107
[ 3, 4, 4, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1...
[ "nonn", "base" ]
A053280
[ 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 3, 2, 3, 3, 3, 3, 5, 4, 4, 5, 6, 5, 6, 6, 7, 7, 8, 8, 10, 9, 10, 11, 12, 11, 14, 13, 15, 16, 17, 17, 20, 19, 21, 22, 24, 24, 27, 27, 30, 31, 33, ...
[ "nonn", "easy" ]
A123877
[ 1, -1, 0, 3, -9, 18, -27, 27, 0, -81, 243, -486, 729, -729, 0, 2187, -6561, 13122, -19683, 19683, 0, -59049, 177147, -354294, 531441, -531441, 0, 1594323, -4782969, 9565938, -14348907, 14348907, 0, -43046721 ]
[ "easy", "sign" ]
A255967
[ 1, 1973, 3181, 3967, 4889, 5617, 7747, 7913, 8363, 8587, 8923, 11437, 11993, 12517, 13285, 13973, 14101, 14231, 14489, 16117, 16769, 16849, 18391, 18611, 19583, 19819, 21289, 21683, 21701, 21893, 22147, 22817, 22949, 23651, 24943, 25829, 27197,...
[ "nonn" ]
A009665
[ 0, 2, 0, -32, -640, 1024, 661504, 25305088, -948699136, -216606572544, -10006005547008, 2013855760777216, 462400685741178900, 10633324821284389000, -1.6549579084211149e+22 ]
[ "sign" ]
A153821
[ 2, 5, 5, 2, 76, 2, 2, 438, 438, 2, 2, 704, 10908, 704, 2, 2, 1126, 103592, 103592, 1126, 2, 2, 1740, 320142, 3545032, 320142, 1740, 2, 2, 2582, 794802, 47373814, 47373814, 794802, 2582, 2, 2, 3688, 1757864, 224887000, 2051605292, 2248...
[ "nonn", "tabl" ]
A045708
[ 2, 23, 29, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 2003, 2011, 2017, 2027, 2029, 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161, 217...
[ "nonn", "base", "easy" ]
A068902
[ 2, 4, 6, 8, 15, 18, 21, 24, 27, 30, 33, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 2...
[ "nonn" ]
A347102
[ 0, 1, 2, 2, 2, 3, 4, 3, 4, 3, 2, 4, 4, 5, 4, 4, 2, 5, 4, 4, 6, 3, 6, 5, 4, 5, 6, 6, 2, 5, 6, 5, 4, 3, 6, 6, 4, 5, 6, 5, 2, 7, 4, 4, 6, 7, 6, 6, 8, 5, 4, 6, 6, 7, 4, 7, 6, 3, 2, 6, 6, 7, 8, 6...
[ "nonn" ]
A005261
[ 1, 2, 34, 488, 9826, 206252, 4734304, 113245568, 2816649826, 72001228052, 1883210876284, 50168588906768, 1357245464138656, 37198352117916990, 1030920212982957200, 28847760730478658000, 814066783370084000000 ]
[ "nonn", "easy" ]
A260444
[ 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0...
[ "nonn", "easy" ]
A071762
[ 0, 1, 2, 11, 21, 12, 111, 211, 121, 112, 1111, 2111, 1211, 1121, 1112, 11111, 21111, 12111, 11211, 11121, 11112, 111111, 211111, 121111, 112111, 111211, 111121, 111112, 1111111, 2111111, 1211111, 1121111, 1112111, 1111211, 1111121, 1111112 ]
[ "nonn", "easy" ]
A352394
[ 1, 2, 3, 10, 21, 5, 7, 15, 14, 165, 182, 11, 13, 22, 39, 110, 273, 55, 91, 220, 819, 4, 9, 20, 63, 260, 693, 26, 33, 130, 231, 65, 77, 195, 154, 3315, 2926, 17, 19, 34, 57, 170, 399, 85, 133, 255, 266, 51, 38, 357, 1...
[ "nonn" ]
A075985
[ 1, 11, 41, 121, 157, 5317, 58247, 74741 ]
[ "nonn", "more" ]
A090540
[ 3, 131, 11311, 771131177, 33337711311773332, 7.777773333771131e+28, 3.777777333377113e+30, 3.3377777733337714e+34, 3.3333333777777333e+44, 9.933333333777777e+48, 3.3333993333333376e+58 ]
[ "base", "nonn" ]
A027262
[ 1, 3, 8, 58, 196, 1608, 5774, 48924, 180772, 1553940, 5837908, 50618184, 192239854, 1676640462, 6416509142, 56201554888, 216309089956, 1900789437276, 7347943049432, 64734185205960, 251119894730596, 2216888144737508, 8624336421678788, 76265067399850850, 297394187356638...
[ "nonn" ]
A190517
[ 3, 8, 13, 18, 23, 28, 34, 39, 45, 49, 56, 60, 65, 71, 75, 81, 86, 91, 98, 102, 106, 112, 117, 123, 127, 133, 138, 144, 148, 154, 159, 164, 169, 174, 179, 186, 190, 196, 200, 207, 211, 215, 222, 225, 232, 238, 242, 248, 2...
[ "nonn" ]
A336488
[ 1, 2, 3, 4, 6, 7, 8, 10, 12, 15, 16, 18, 20, 22, 24, 26, 28, 30, 31, 32, 36, 40, 42, 44, 46, 48, 52, 54, 56, 58, 60, 63, 64, 66, 70, 72, 78, 80, 82, 84, 88, 92, 96, 100, 102, 104, 106, 108, 110, 112, 116, 120, 12...
[ "nonn" ]
A154743
[ 3, 4, 8, 3, 1, 0, 6, 9, 9, 7, 4, 9, 0, 0, 6, 5, 2, 3, 6, 8, 6, 3, 7, 4, 4, 9, 4, 3, 2, 7, 2, 6, 1, 0, 2, 0, 2, 5, 2, 9, 3, 7, 8, 3, 0, 1, 0, 7, 0, 3, 2, 9, 0, 2, 2, 0, 5, 7, 7, 6, 1, 3, 8, 7...
[ "nonn", "cons", "easy" ]
A012936
[ 1, 2, 4, 9, 24, 89, 438, 2527, 16072, 111257, 851866, 7138923, 65286276, 641779181, 6769229670, 76040241775, 908362886512, 11481062493713, 153172480730482, 2149793170916115, 31664861861245692 ]
[ "nonn" ]
A159461
[ 0, 1, 2, 4, 4, 4, 4, 4, 8, 6, 6, 8, 4, 4, 8, 10, 6, 6, 8, 4, 6, 8, 8, 12, 10, 4, 4, 4, 4, 16, 16, 8, 6, 10, 10, 6, 10, 8, 8, 10, 6, 10, 10, 4, 4, 12, 22, 14, 4, 4, 8, 6, 10, 14, 10, 10, 6, 6, 8, 4, ...
[ "nonn" ]
A275273
[ 4, 5, 7, 13, 17, 19, 37, 37, 31, 41, 19, 59, 109, 71, 179, 73, 59, 73, 113, 53, 47, 127, 149, 263, 107, 241, 59, 103, 317, 241, 317, 113, 197, 127, 109, 647, 397, 67, 281, 67, 211, 163, 109, 107, 439, 521, 709, 101, 383,...
[ "nonn", "easy" ]
A063944
[ 1, 1, 2, 2, 6, 6, 6, 4, 6, 8, 2, 8, 8, 6, 4, 4, 6, 6, 8, 2, 6, 4, 4, 8, 2, 2, 6, 2, 2, 6, 4, 6, 2, 2, 8, 4, 6, 8, 2, 2, 2, 2, 8, 6, 6, 6, 2, 2, 6, 8, 4, 2, 2, 2, 8, 8, 4, 4, 2, 6, 8, 6, 4, 6...
[ "nonn", "base" ]
A017239
[ 279936, 170859375, 4586471424, 42618442977, 230539333248, 897410677851, 2799360000000, 7446353252589, 17565568854912, 37725479487783, 75144747810816, 140710042265625, 250226879128704, 425927596977747 ]
[ "nonn", "easy" ]
A230492
[ 6, 28, 117, 475, 496, 775, 2009, 8128, 13079, 13189, 14663, 16211, 23903, 26675, 30503, 35425, 37271, 41123, 43681, 44591, 46163, 47519, 55991, 59831, 63971, 66263, 66785, 73511, 76751, 78319, 81923, 88559, 88723, 107423, 112631, 127571, 130271...
[ "nonn" ]
A098162
[ 1, 2, 3, 6, 8, 10, 15, 18, 24, 28, 32, 40, 45, 54, 60, 70, 77, 84, 96, 104, 117, 126, 140, 150, 165, 176, 187, 204, 216, 234, 247, 266, 280, 300, 315, 336, 352, 368, 391, 408, 432, 450, 475, 494, 520, 540, 567, 588, 616,...
[ "nonn" ]
A032743
[ 19, 31, 69, 81, 105, 106, 107, 119, 127, 131, 169, 181, 190, 219, 231, 247, 269, 281, 310, 318, 319, 331, 332, 333, 334, 335, 336, 337, 338, 339, 348, 369, 381, 419, 431, 454, 469, 481, 511, 519, 531, 558, 569, 581, 601, 619, ...
[ "nonn", "base" ]
A159586
[ 4, 8, 12, 1, 20, 24, 28, 2, 16, 40, 44, 3, 52, 56, 60, 9, 68, 32, 76, 5, 84, 88, 92, 6, 36, 104, 48, 7, 116, 120, 124, 18, 132, 136, 140, 25, 148, 152, 156, 10, 164, 168, 172, 11, 80, 184, 188, 27, 64, 72, 204, 13,...
[ "nonn" ]
A333550
[ 0, 1, 6, 7, 24, 45, 90, 163, 264, 285, 453, 514, 909, 912, 961, 1687, 1707, 1743, 2941, 2947, 3136, 5037, 5313, 5561, 5809, 9586, 9916, 9929, 10118, 10318, 17626, 18026, 18419, 18753, 18783, 18952, 31942, 33709, 34027, 34153, 34377, 3...
[ "nonn" ]
A111761
[ 2, 5, 9, 4, 0, 2, 3, 0, 0, 2, 4, 9, 7, 5, 0, 9, 7, 9, 7, 4, 8, 6, 8, 6, 7, 7, 7, 9, 1, 1, 0, 5, 0, 1, 2, 0, 6, 0, 9, 0, 4, 7, 9, 6, 8, 2, 9, 6, 5, 1, 2, 1, 8, 8, 8, 6, 5, 9, 7, 6, 7, 9, 3, 3...
[ "cons", "nonn" ]
A088491
[ 2, 3, 4, 5, 3, 7, 4, 9, 3, 11, 3, 13, 3, 15, 4, 17, 3, 19, 3, 21, 3, 23, 3, 25, 3, 27, 3, 29, 3, 31, 4, 33, 3, 35, 3, 37, 3, 39, 3, 41, 3, 43, 3, 45, 3, 47, 3, 49, 3, 51, 3, 53, 3, 55, 3, 57, 3, 59, 3...
[ "nonn" ]
A187906
[ 3, 5, 9, 13, 15, 17, 21, 23, 26, 29, 33, 36, 39, 41, 45, 48, 51, 54, 56, 60, 62, 65, 68, 71, 74, 77, 80, 84, 86, 88, 92, 94, 98, 100, 104, 106, 110, 113, 116, 118, 122, 125, 128, 131, 134, 137, 139, 143, 145, 149, 15...
[ "nonn" ]
A274006
[ 1, 1, 1, 4, 1, 1, 1, 8, 9, 1, 1, 4, 1, 1, 1, 16, 1, 9, 1, 4, 1, 1, 1, 8, 25, 1, 27, 4, 1, 1, 1, 32, 1, 1, 1, 9, 1, 1, 1, 8, 1, 1, 1, 4, 9, 1, 1, 16, 49, 25, 1, 4, 1, 27, 1, 8, 1, 1, 1, 4, 1, 1, ...
[ "nonn" ]
A060181
[ 1, 2, 6, 18, 70, 300, 1806, 9100, 37332, 205560, 4853530, 49841616, 789513660, 9021065872, 70737031470, 420565124400, 22959075244096, 385032305178720, 10010973102879762, 152163983393187400, 1498273284120348400, 15639918041915599000, 1.2962042027234005e+21 ]
[ "nonn" ]
A056343
[ 0, 0, 1, 6, 18, 56, 147, 411, 1084, 2979, 8043, 22244, 61278, 171030, 477929, 1345236, 3795750, 10758902, 30572427, 87149124, 248991822, 713096352, 2046303339, 5883433409, 16944543810, 48879769575 ]
[ "nonn" ]
A053799
[ 1, 2, 4, 8, 12, 18, 26, 34, 44, 56, 68, 82, 98, 114, 132, 152, 172, 194, 218, 242, 268, 296, 324, 354, 386, 418, 452, 488, 524, 562, 602, 642, 684, 728, 772, 818, 866, 914, 964, 1016, 1068, 1122, 1178, 1234, 1292, 1352, 1412...
[ "easy", "nonn" ]
A021330
[ 0, 0, 3, 0, 6, 7, 4, 8, 4, 6, 6, 2, 5, 7, 6, 6, 8, 7, 1, 1, 6, 5, 6, 4, 4, 1, 7, 1, 7, 7, 9, 1, 4, 1, 1, 0, 4, 2, 9, 4, 4, 7, 8, 5, 2, 7, 6, 0, 7, 3, 6, 1, 9, 6, 3, 1, 9, 0, 1, 8, 4, 0, 4, 9...
[ "nonn", "cons", "easy" ]
A110415
[ 11, 11, 12, 106, 1024, 1120, 10720, 105040, 1040320, 10362880, 103628800, 1039916800, 10479001600, 106227020800, 10087178291200, 101307674368000, 1020922789888000, 10355687428096000, 1006402373705728000 ]
[ "base", "easy", "nonn" ]
A283304
[ 0, 0, 1, 0, 1, 2, 0, 1, 2, 0, 1, 3, 2, 3, 0, 1, 2, 4, 3, 0, 1, 2, 4, 3, 0, 5, 1, 4, 2, 3, 5, 0, 4, 1, 2, 6, 3, 5, 4, 0, 1, 6, 2, 5, 3, 4, 7, 6, 0, 1, 2, 5, 3, 7, 4, 6, 0, 1, 5, 2, 8, 7, 3, 6...
[ "nonn" ]
A241377
[ 0, 1, 0, 1, 0, 1, 2, 2, 3, 4, 5, 6, 8, 11, 12, 16, 20, 27, 31, 40, 49, 59, 72, 95, 110, 133, 164, 196, 237, 289, 351, 410, 502, 595, 704, 843, 1009, 1193, 1422, 1658, 1983, 2332, 2744, 3204, 3796, 4459, 5189, 6083, 7116,...
[ "nonn", "easy" ]
A293920
[ 1, 159, 7564, 245964, 6996588, 193799140, 5489211751, 162272284974, 5047554996855, 165595774518042, 5728636935767404, 208700950019470460, 7993330299623656000, 321268248361695840000, 1.352550676351737e+22, 5.954150974858056e+23, 2.7361311228606445e+25 ]
[ "nonn" ]
A340089
[ 0, 1, 1, 1, 1, 5, 1, 7, 1, 9, 1, 11, 1, 13, 7, 1, 1, 17, 1, 19, 5, 21, 1, 23, 1, 25, 13, 3, 1, 29, 1, 31, 8, 33, 17, 35, 1, 37, 19, 13, 1, 41, 1, 43, 11, 45, 1, 47, 1, 49, 25, 17, 1, 53, 27, 55, 14, 57,...
[ "nonn" ]
A147095
[ 1, 1, 1, 1, 3, 3, 5, 7, 23, 43, 97, 209, 521, 1391, 4635, 14277, 54221, 189323, 860301, 3540691, 18022413, 86154579, 507402119, 2814410215, 19349048791, 125262392501 ]
[ "nonn" ]
A093441
[ 3, 7, 31, 211, 2311, 43891, 1272811, 16546531, 976245271, 36121074991, 1119753324691, 52628406260431, 3526103219448811, 186883470630786940, 7662222295862264000, 743235562698639700000, 5.425619607700069e+22, 6.130950156701079e+24, 6.314878661402111e+26 ]
[ "nonn" ]
A197269
[ 3, 4, 2, 5, 6, 6, 4, 7, 6, 2, 7, 7, 5, 2, 2, 2, 4, 3, 6, 3, 6, 0, 3, 7, 7, 4, 5, 7, 7, 0, 8, 8, 5, 7, 1, 1, 6, 3, 4, 2, 6, 7, 2, 1, 5, 6, 2, 4, 3, 6, 3, 2, 1, 7, 7, 4, 3, 4, 4, 7, 7, 3, 3, 8...
[ "nonn", "cons" ]
A004048
[ 1, 0, 756, 8736, 44226, 187488, 531468, 1314144, 3097332, 6141408, 10968048, 21258720, 34038186, 53778816, 88943400, 131804064, 184024386, 289650816, 387420516, 524343456, 756139104, 992308512 ]
[ "nonn" ]