OFFSET
0,15
COMMENTS
The OEIS contains many very similar sequences, but this one was missing.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
PROG
(PARI) my(N=66, x='x+O('x^N)); concat([0, 0, 0, 0], Vec(sum(k=1, N, x^(k*(3*k+1))/(1-x^k)))) \\ Seiichi Manyama, Dec 04 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 03 2020
STATUS
approved