OFFSET
1,3
FORMULA
a(n) ~ exp(2*Pi*sqrt(n/15)) * Gamma(1/5) * Gamma(3/5) / (4 * 3^(3/20) * 5^(7/20) * Pi^(6/5) * n^(13/20)). - Vaclav Kotesovec, Aug 27 2015
MATHEMATICA
nmax = 100; Rest[CoefficientList[Series[Product[1/((1 - x^(5k+1))*(1 - x^(5k+3))), {k, 0, nmax}], {x, 0, nmax}], x]] (* Vaclav Kotesovec, Aug 27 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved