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Search: a102314 -id:a102314
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Expansion of 1 / (chi(-x) * chi(-x^7)) in powers of x where chi() is a Ramanujan theta function.
+10
5
1, 1, 1, 2, 2, 3, 4, 6, 7, 9, 12, 14, 18, 22, 28, 34, 41, 50, 60, 72, 86, 105, 124, 146, 174, 204, 240, 282, 332, 386, 450, 524, 606, 703, 812, 940, 1082, 1243, 1428, 1636, 1873, 2140, 2448, 2788, 3172, 3610, 4096, 4646, 5264, 5962, 6736, 7606, 8582, 9666, 10884
FORMULA
G.f. is a period 1 Fourier series which satisfies f(-1 / (126 t)) = 1/2 * g(t) where q = exp(2 Pi i t) and g() is the g.f. of A102314. - Michael Somos, Dec 03 2013
a(n) = A112212(2*n + 1) = - A102314(2*n + 1). - Michael Somos, Dec 03 2013
Convolution inverse of A102314.
CROSSREFS
McKay-Thompson series of class 84C for the Monster group.
+10
4
1, 1, 0, 1, 1, 1, 1, 2, 3, 2, 3, 3, 4, 4, 4, 6, 7, 7, 7, 9, 10, 12, 13, 14, 17, 18, 19, 22, 26, 28, 29, 34, 38, 41, 44, 50, 57, 60, 65, 72, 81, 86, 94, 105, 114, 124, 133, 146, 161, 174, 187, 204, 224, 240, 258, 282, 309, 332, 354, 386, 419, 450, 481, 524, 569, 606
FORMULA
a(n) = (-1)^n * A102314(n). a(2*n + 1) = A093950(n). - Michael Somos, Dec 03 2013
CROSSREFS
Expansion of psi(x^2) * phi(x^7) / (f(-x) * f(-x^7)) in powers of x where phi(), psi(), f() are Ramanujan theta functions.
+10
2
1, 1, 3, 4, 7, 10, 17, 26, 38, 57, 81, 114, 161, 224, 309, 419, 569, 759, 1011, 1336, 1757, 2296, 2981, 3855, 4956, 6344, 8087, 10272, 12994, 16367, 20561, 25723, 32086, 39902, 49484, 61182, 75439, 92791, 113821, 139294, 170073, 207187, 251853
FORMULA
a(n) = A102314(4*n).
CROSSREFS
Cf. A102314.
Expansion of x * phi(x) * psi(x^14) / (f(-x) * f(-x^7)) in powers of x where phi(), psi(), f() are Ramanujan theta functions.
+10
2
0, 1, 3, 4, 7, 13, 19, 29, 44, 65, 94, 133, 187, 258, 354, 481, 651, 871, 1154, 1526, 1998, 2603, 3376, 4358, 5594, 7148, 9103, 11531, 14560, 18320, 22972, 28708, 35757, 44413, 54990, 67904, 83626, 102736, 125890, 153882, 187694, 228396, 277336
FORMULA
a(n) = A102314(4*n + 2).
CROSSREFS
Cf. A102314.

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