OFFSET
0,3
FORMULA
E.g.f.: Product_{k>0} exp(x^(3*k-1)).
a(n) ~ exp(2*sqrt(3*n)/3 - n - 1/6) * n^(n-1/4) / (sqrt(2) * 3^(1/4)). - Vaclav Kotesovec, Oct 10 2017
PROG
(PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(x^2/(1-x^3))))
(PARI) N=66; x='x+O('x^N); Vec(serlaplace(prod(k=1, N, exp(x^(3*k-1)))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Oct 10 2017
STATUS
approved