OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1000
FORMULA
G.f.: Sum_{k>0} (1-(-1)^k)/2*k*x^k/(1-2*x^k). - Vladeta Jovovic, Oct 17 2003
PROG
(PARI) a(n) = if (n, sumdiv(n, d, if (d%2, d*2^(n/d - 1))), 0); \\ Michel Marcus, Mar 10 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 16 2000
STATUS
approved