OFFSET
1,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..80
MATHEMATICA
Table[Sum[d^(n^2/d), {d, Divisors[n]}], {n, 1, 20}] (* Vaclav Kotesovec, Jun 09 2019 *)
PROG
(PARI) {a(n) = sumdiv(n, d, d^(n^2/d))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jun 09 2019
STATUS
approved