OFFSET
1,9
FORMULA
a(n) ~ exp(Pi*sqrt(2*n)/3) * Gamma(2/3) / (4 * 2^(1/6) * sqrt(3) * Pi^(1/3) * n^(5/6)). - Vaclav Kotesovec, Aug 27 2015
MATHEMATICA
nmax = 100; Rest[CoefficientList[Series[Product[1/((1 - x^(6k+3))*(1 - x^(6k+4))), {k, 0, nmax}], {x, 0, nmax}], x]] (* Vaclav Kotesovec, Aug 27 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved