OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..27
PROG
(PARI) {a(n) = sum(i=n, n^2, i!*polcoef(sum(j=1, n, binomial(n-1, j-1)*x^j/j!)^n, i))/n!}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 27 2019
STATUS
approved