OFFSET
0,5
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000
FORMULA
G.f.: Sum_{k>=0} x^(k^2) / (1 - x^k)^k.
G.f.: 1 + Sum_{n>=1} (1 + x^n)^(n-1) * x^n. - Paul D. Hanna, Jul 09 2019
a(n) = Sum_{d|n} binomial(n/d-1, d-1) for n>0 with a(0) = 1. - Paul D. Hanna, Apr 25 2018
G.f.: 1 + Sum_{n>=1} (x^n/(1-x^n))^n (conjecture). - Joerg Arndt, Jan 04 2024
PROG
(PARI) {a(n) = if(n==0, 1, sumdiv(n, d, binomial(n/d-1, d-1) ))}
for(n=0, 50, print1(a(n), ", ")) \\ Paul D. Hanna, Apr 25 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Sep 03 2008
EXTENSIONS
More terms from Franklin T. Adams-Watters, Apr 09 2009
STATUS
approved