OFFSET
0,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..10000
FORMULA
a(n) ~ exp(2*Pi*sqrt(n/3)) * (2*gamma + log(3*n/Pi^2)) / (8*3^(1/4)*Pi*n^(3/4)), where gamma is the Euler-Mascheroni constant A001620.
MATHEMATICA
nmax = 40; CoefficientList[Series[Sum[x^k/(1-x^k), {k, 1, nmax}] * Product[1/(1-x^k)^2, {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, May 26 2018
STATUS
approved