OFFSET
1,2
COMMENTS
Multiplicative because A293442 is.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..16384
Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537
FORMULA
a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d<n} A293442(n/d) * a(d).
PROG
(PARI)
A019565(n) = { my(m=1, p=1); while(n>0, p = nextprime(1+p); if(n%2, m *= p); n >>= 1); (m); };
memoA354825 = Map();
CROSSREFS
KEYWORD
sign,mult
AUTHOR
Antti Karttunen, Jun 09 2022
STATUS
approved