OFFSET
1,7
FORMULA
a(n) ~ exp(2*Pi*sqrt(n/15)) * Gamma(2/5) / (4 * 3^(9/20) * 5^(1/20) * Pi^(3/5) * n^(19/20)). - Vaclav Kotesovec, Aug 27 2015
MATHEMATICA
nmax = 100; Rest[CoefficientList[Series[Product[1/((1 - x^(5k+5))*(1 - x^(5k+2))), {k, 0, nmax}], {x, 0, nmax}], x]] (* Vaclav Kotesovec, Aug 27 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved