OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..399
FORMULA
a(n) = Sum_{k=1..n} k^(n-k) * (-n)^(k-1) * binomial(n,k).
PROG
(PARI) a(n) = sum(k=1, n, k^(n-k)*(-n)^(k-1)*binomial(n, k));
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Feb 09 2023
STATUS
approved