OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..30
EXAMPLE
a(2) = 4: (1,1), (1,2), (1,3), (1,4).
MAPLE
b:= proc(n, k) option remember; `if`(n=0, 1, add(
b(j-1, k)*(-1)^(n-j)*binomial(j^k, n-j+1), j=1..n))
end:
a:= n-> b(n$2):
seq(a(n), n=0..10);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2022
STATUS
approved