OFFSET
1,9
COMMENTS
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..16384
FORMULA
a(1) = 1, for n > 1, a(n) = -Sum_{d|n, d<n} (A319340(n/d)-1) * a(d).
PROG
CROSSREFS
KEYWORD
sign,look
AUTHOR
Antti Karttunen, Jan 05 2021
STATUS
approved