OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..452
FORMULA
E.g.f.: exp(exp(x)*(x^4+6*x^3+7*x^2+x)).
MAPLE
a:= proc(n) option remember; `if`(n=0, 1,
add(binomial(n-1, j-1)*j^4*a(n-j), j=1..n))
end:
seq(a(n), n=0..25);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 16 2016
STATUS
approved