OFFSET
0,21
FORMULA
G.f.: Sum_{k>=0} x^(5*k^2)/Product_{j=1..k} (1-x^j).
PROG
(PARI) my(N=90, x='x+O('x^N)); Vec(sum(k=0, N, x^(5*k^2)/prod(j=1, k, 1-x^j)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 22 2024
STATUS
approved