OFFSET
0,2
COMMENTS
LINKS
FORMULA
G.f.: Product_{k>=1} (1 + x^A000217(k))^2.
a(n) ~ exp(3*Pi^(1/3) * ((sqrt(2)-1) * Zeta(3/2)/2)^(2/3) * n^(1/3)) * ((sqrt(2)-1) * Zeta(3/2) / (2*Pi))^(1/3) / (4*sqrt(3) * n^(5/6)). - Vaclav Kotesovec, Mar 05 2018
MATHEMATICA
nmax = 65; CoefficientList[Series[Product[(1 + x^(k (k + 1)/2))^2, {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Mar 05 2018
STATUS
approved