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A285990
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Expansion of Product_{n>0} ((1-x^n)/(1+x^n))^(n^3) in powers of x.
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5
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1, -2, -14, -24, 78, 536, 1236, -308, -12322, -45218, -73680, 76144, 872868, 2833904, 4612952, -2467592, -42205746, -147191388, -285572658, -127256088, 1376616024, 6138841704, 14949184532, 19201535108, -18287313476, -186761626394, -604980766280
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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(0) = 1, a(n) = -(2/n)*Sum_{k=1..n} A285989(k)*a(n-k) for n > 0.
G.f.: exp(Sum_{k>=1} (sigma_4(k) - sigma_4(2*k))*x^k/(8*k)). - Ilya Gutkovskiy, Apr 14 2019
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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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