OFFSET
1,18
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..101025
FORMULA
a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d<n} A010054(n/d) * a(d).
PROG
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Oct 05 2023
STATUS
approved