OFFSET
1,3
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
FORMULA
a(n) = numerator of f(n), where f(1) = 1, f(n) = (1/2) * (A055653(n) - Sum_{d|n, d>1, d<n} f(d) * f(n/d)) for n > 1.
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 03 2018
STATUS
approved