A294773 a(n) = Sum_{d|n} d^(d+n+1).

1, 33, 2188, 262273, 48828126, 13060753578, 4747561509944, 2251799880796161, 1350851717674586413, 1000000000152587898818, 895430243255237372246532, 953962166441299506564257602, 1192533292512492016559195008118

Offset: 1

Author

Seiichi Manyama, Nov 08 2017

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..214

Crossrefs

Cf. A294645, A294704, A294757.

Programs

Mathematica

a[n_] := DivisorSum[n, #^(# + n + 1) &]; Array[a, 13] (* Amiram Eldar, Oct 04 2023 *)

PARI

{a(n) = sumdiv(n, d, d^(d+n+1))}