OFFSET
0,4
FORMULA
a(n) = n^3 * a(n-1) + (-1)^n.
PROG
(PARI) a(n) = n!^3*sum(k=0, n, (-1)^k/k!^3);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jan 07 2024
STATUS
approved