OFFSET
0,17
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..20000
FORMULA
G.f.: Product_{k>0} (1 + x^(8*k - 1)) * (1 + x^(8*k - 7)).
a(n) ~ exp(sqrt(n/3)*Pi/2) / (4*3^(1/4)*n^(3/4)) * (1 + (11*Pi/(192*sqrt(3)) - 3*sqrt(3)/(4*Pi))/sqrt(n)). - Vaclav Kotesovec, Mar 20 2017
MATHEMATICA
CoefficientList[Series[Product[(1 + x^(8*k - 1)) * (1 + x^(8*k - 7)) , {k, 1, 81}], {x, 0, 81}], x] (* Indranil Ghosh, Mar 20 2017 *)
PROG
(PARI) Vec(prod(k=1, 81, (1 + x^(8*k - 1)) * (1 + x^(8*k - 7))) + O(x^82)) \\ Indranil Ghosh, Mar 20 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Mar 20 2017
STATUS
approved