OFFSET
1,9
FORMULA
a(n) ~ exp(2*Pi*sqrt(n/15)) * 5^(3/20) * Gamma(4/5) / (4 * 3^(13/20) * Pi^(1/5) * n^(23/20)). - Vaclav Kotesovec, Aug 27 2015
MATHEMATICA
nmax = 100; Rest[CoefficientList[Series[Product[1/((1 - x^(5k+5))*(1 - x^(5k+4))), {k, 0, nmax}], {x, 0, nmax}], x]] (* Vaclav Kotesovec, Aug 27 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved