OFFSET
1,8
COMMENTS
The first positive term after a(1) occurs as a(144) = 13.
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} A075255(n/d) * a(d).
PROG
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Jan 15 2023
STATUS
approved