OFFSET
1,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..386
N. J. A. Sloane, Transforms
EXAMPLE
(1+x)^(-1)*(1+x^2)^3*(1+x^3)^(-23)*(1+x^4)^226* ... = 1 - x + 4*x^2 - 27*x^3 + 256*x^4 - ... .
MAPLE
b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,
add(binomial(a(i), j)*b(n-i*j, i-1), j=0..n/i)))
end:
a:= n-> (-n)^n-b(n, n-1):
seq(a(n), n=1..24); # Alois P. Heinz, Jun 23 2018
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Jun 23 2018
STATUS
approved