OFFSET
0,3
COMMENTS
This sequence is obtained from the generalized Euler transform in A266964 by taking f(n) = n*(3*n-1)/2, g(n) = -1.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
PROG
(PARI) N=66; x='x+O('x^N); Vec(1/prod(k=1, N, (1+x^k)^(k*(3*k-1)/2)))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Nov 15 2017
STATUS
approved