OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..451
FORMULA
a(0) = 1 and a(n) = (n-1)! * Sum_{k=1..n} A010815(k)*a(n-k)/(n-k)! for n > 0.
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Oct 28 2017
STATUS
approved