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A303343
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Expansion of Product_{n>=1} ((1 - (n*x)^n)/(1 + (n*x)^n))^(1/n).
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2
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1, -2, -2, -12, -90, -968, -12764, -200464, -3674378, -76958942, -1814783184, -47618072204, -1376556963244, -43481881639608, -1490306874257184, -55091497907730000, -2185104061817592618, -92567886910879671396, -4171638481112174023226
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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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G.f.: exp(Sum_{k>=1} (sigma_k(k) - sigma_k(2*k))*x^k/(2^(k-1)*k)). - Ilya Gutkovskiy, Apr 14 2019
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PROG
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(PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, ((1-(k*x)^k)/(1+(k*x)^k))^(1/k)))
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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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