OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..6927
PROG
(PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, (1-k^2*x^k)^k))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Nov 02 2017
STATUS
approved