OFFSET
1,144
COMMENTS
a(144) = 2 is the first term > 1.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
FORMULA
a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d<n} A369001(n/d) * a(d).
PROG
(PARI)
A083345(n) = { my(f=factor(n)); numerator(vecsum(vector(#f~, i, f[i, 2]/f[i, 1]))); };
memoA369974 = Map();
CROSSREFS
Agrees paritywise with A369978.
KEYWORD
sign
AUTHOR
Antti Karttunen, Feb 09 2024
STATUS
approved