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A022618
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Expansion of Product_{m>=1} (1+q^m)^(-23).
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2
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1, -23, 253, -1794, 9384, -39491, 142462, -460483, 1370041, -3810479, 10013533, -25082512, 60303171, -139870107, 314254704, -686285914, 1461009887, -3039222369, 6190256915, -12366732828, 24269855093
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) ~ (-1)^n * 23^(1/4) * exp(Pi*sqrt(23*n/6)) / (2^(7/4) * 3^(1/4) * n^(3/4)). - Vaclav Kotesovec, Aug 27 2015
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MATHEMATICA
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nmax = 50; CoefficientList[Series[Product[1/(1 + x^k)^23, {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Aug 27 2015 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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