OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
G.f.: Product_{k>0} ((1 - x^(2*k))^2/((1 - x^k)*(1 - x^(3*k))))^2.
MATHEMATICA
nmax = 100; CoefficientList[Series[Product[((1 - x^(2*k))^2/((1 - x^k)*(1 - x^(3*k))))^2, {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Oct 08 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Oct 07 2017
STATUS
approved