OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..26
FORMULA
E.g.f.: Sum_{k>=0} (k^k * x)^k / (k! * (1 - k^k * x)).
PROG
(PARI) a(n) = n!*sum(k=0, n, k^(k*n)/k!);
(PARI) my(N=10, x='x+O('x^N)); Vec(serlaplace(sum(k=0, N, (k^k*x)^k/(k!*(1-k^k*x)))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Aug 23 2022
STATUS
approved