OFFSET
1,2
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
FORMULA
MATHEMATICA
Array[DivisorSum[#, # &, MoebiusMu@ # == -1 &] &, 96] (* Michael De Vlieger, Sep 04 2018 *)
PROG
(PARI) A318675(n) = sumdiv(n, d, (-1==moebius(d))*d);
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 04 2018
STATUS
approved