OFFSET
0,4
LINKS
Winston de Greef, Table of n, a(n) for n = 0..460
FORMULA
a(n) = Sum_{i=0..n} (-1)^(n-i) * binomial(n,i) * Sum_{j=0..n-i} i^j * j^(n-i-j) * binomial(n-i,j).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp(x*exp(-x*exp(-x)))))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Apr 13 2023
STATUS
approved