OFFSET
0,9
FORMULA
EXAMPLE
a(8) = 3 counts these partitions: 8, 53, 521.
PROG
(PARI) my(N=70, x='x+O('x^N)); concat([0, 0], Vec(sum(k=0, N, x^(3*k+2)*prod(j=1, 3*k+1, 1+x^j))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 20 2024
STATUS
approved