OFFSET
0,2
FORMULA
a(n) ~ n! * n^n. - Vaclav Kotesovec, Jan 13 2024
PROG
(PARI) a(n) = sum(k=0, n, k!*n^k);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Dec 30 2023
STATUS
approved