OFFSET
0,2
FORMULA
a(n) = [x^n] 1/((1-n*x) * (1-x)^(n+1)).
a(n) ~ exp(1) * n^n. - Vaclav Kotesovec, Dec 28 2023
PROG
(PARI) a(n) = sum(k=0, n, n^(n-k)*binomial(n+k, k));
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Dec 28 2023
STATUS
approved