OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
FORMULA
a(n) ~ (-1)^n * 5^(1/4) * exp(Pi*sqrt(5*n)) / (2^(3/2) * n^(3/4)). - Vaclav Kotesovec, Aug 27 2015
MATHEMATICA
nmax = 50; CoefficientList[Series[Product[1/(1 + x^k)^30, {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Aug 27 2015 *)
CROSSREFS
KEYWORD
sign
AUTHOR
STATUS
approved