OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = -(1/n)*Sum_{k=1..n} sigma_2(2*k)*a(n-k). - Seiichi Manyama, Mar 04 2017
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Mar 03 2017
STATUS
approved