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A058680
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McKay-Thompson series of class 44a for Monster.
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1
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1, -3, -2, -3, -3, -5, -5, -9, -8, -14, -14, -23, -22, -35, -34, -53, -52, -76, -78, -110, -111, -154, -162, -216, -226, -297, -316, -407, -433, -550, -590, -739, -793, -986, -1066, -1306, -1408, -1720, -1860, -2246, -2436, -2919, -3170, -3774, -4101, -4856, -5288, -6213, -6769
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OFFSET
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-1,2
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LINKS
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FORMULA
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Expansion of A - 2*q/A, where A = q^(1/2)*(eta(q)*eta(q^11)/( eta(q^2)* eta(q^22))), in powers of q. - G. C. Greubel, Jun 27 2018
a(n) ~ -exp(2*Pi*sqrt(n/11)) / (2 * 11^(1/4) * n^(3/4)). - Vaclav Kotesovec, Jun 29 2018
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EXAMPLE
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T44a = 1/q - 3*q - 2*q^3 - 3*q^5 - 3*q^7 - 5*q^9 - 5*q^11 - 9*q^13 - 8*q^15 - ...
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MATHEMATICA
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eta[q_] := q^(1/24)*QPochhammer[q]; A:= q^(1/2)*(eta[q]*eta[q^11]/( eta[q^2]*eta[q^22])); a:= CoefficientList[Series[A - 2*q/A, {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jun 27 2018 *)
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PROG
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(PARI) q='q+O('q^50); A = eta(q)*eta(q^11)/(eta(q^2)*eta(q^22)); Vec(A - 2*q/A) \\ G. C. Greubel, Jun 27 2018
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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