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A283264
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Expansion of exp( Sum_{n>=1} -sigma_4(n)*x^n/n ) in powers of x.
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9
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1, -1, -8, -19, -9, 127, 500, 1038, 448, -4967, -21463, -50043, -59084, 70418, 600080, 1837349, 3532062, 3179251, -6965009, -42260393, -119597290, -224546234, -223670132, 292245783, 2156083245, 6428174973, 13030612271, 16820582355, -133402359, -78307103593
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OFFSET
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0,3
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LINKS
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FORMULA
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G.f.: Product_{n>=1} (1 - x^n)^(n^3).
a(n) = -(1/n)*Sum_{k=1..n} sigma_4(k)*a(n-k).
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PROG
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(SageMath) # uses[EulerTransform from A166861]
b = EulerTransform(lambda n: -n^3)
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CROSSREFS
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Cf. A023872 (exp( Sum_{n>=1} sigma_4(n)*x^n/n )).
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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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