OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1412
FORMULA
a(n) ~ exp(3^(17/9) * Pi^(8/9) * (Zeta(9)/5)^(1/9) * n^(8/9) / 2^(7/3) - Zeta'(-7)/2) * (Zeta(9)/(15*Pi))^(241/4320) / (3 * 2^(241/1440) * n^(2401/4320)).
G.f.: exp(Sum_{k>=1} sigma_8(k)*x^k/(k*(1 - x^k))). - Ilya Gutkovskiy, Oct 26 2018
MATHEMATICA
nmax = 30; CoefficientList[Series[Product[1/(1-x^k)^DivisorSigma[7, k], {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Mar 23 2018
STATUS
approved