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

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

Offset

1,2

Links

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

Mathematica

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

Prog

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

Crossrefs

Cf. A294645, A294704, A294757.

Sequence in context: A099370 A267672 A283533 * A294611 A294954 A372903

Adjacent sequences: A294770 A294771 A294772 * A294774 A294775 A294776

Keyword

nonn

Author

Seiichi Manyama, Nov 08 2017

Status

approved