OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..232
FORMULA
a(n) ~ n! * n^n. - Vaclav Kotesovec, Jun 03 2018
PROG
(PARI) {a(n) = sum(k=0, n/2, ((n-k)!/k!)*binomial(n-k, k)*n^(n-2*k)*(-1)^k)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jun 02 2018
STATUS
approved