OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
a(n) ~ exp(Pi*sqrt(n/3)) / (2^(5/3) * 3^(1/4) * n^(3/4)).
MATHEMATICA
nmax = 100; CoefficientList[Series[Product[(1+x^k)^Mod[k, 3], {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Mar 24 2018
STATUS
approved