OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..274
FORMULA
a(n) = n! * [x^n] exp( x * (exp(n * x) + 1) ).
a(n) = [x^n] Sum_{k>=0} x^k / (1 - (n*k+1)*x)^(k+1).
PROG
(PARI) a(n) = sum(k=0, n, (k*n+1)^(n-k)*binomial(n, k));
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Aug 29 2022
STATUS
approved