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A022675
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Expansion of Product_{m >= 1} (1-m*q^m)^15.
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2
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1, -15, 75, -50, -750, 1797, 2220, -6975, -13980, 6220, 125682, -8910, -387885, -365160, 62130, 3177433, 2777445, -3799695, -17320915, -28897950, 39859074, 105240645, 131649465, -50100225, -602800010, -882445182
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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With[{nmax = 50}, CoefficientList[Series[Product[(1 - k*q^k)^15, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 18 2018 *)
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PROG
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(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1-n*q^n)^15)) \\ G. C. Greubel, Jul 18 2018
(Magma) Coefficients(&*[(1-m*x^m)^15:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // G. C. Greubel, Jul 18 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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STATUS
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approved
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