OFFSET
0,13
MATHEMATICA
m = 76; CoefficientList[Series[Product[1/(1 + x^k/(1 + x^(2*k)/(1 + x^(3*k)))), {k, 1, m}], {x, 0, m}], x] (* Amiram Eldar, May 06 2021 *)
PROG
(PARI) N=66; x='x+O('x^N); Vec(1/prod(k=1, N, 1+x^k/(1+x^(2*k)/(1+x^(3*k)))))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Sep 22 2019
STATUS
approved