A308571 a(n) = sigma_{n^2}(n).

1, 17, 19684, 4295032833, 298023223876953126, 10314424798640630250188424914, 256923577521058878088611477224235621321608, 6277101735386680764176071790128604879584176795969512275969

Offset

1,2

Links

Seiichi Manyama, Table of n, a(n) for n = 1..26

Formula

a(n) ~ n^(n^2). - Vaclav Kotesovec, Jun 08 2019

Mathematica

Table[DivisorSigma[n^2, n], {n, 1, 10}] (* Vaclav Kotesovec, Jun 08 2019 *)

Prog

(PARI) {a(n) = sigma(n, n^2)}

Crossrefs

Diagonal of A308569.

Cf. A308670.

Sequence in context: A230638 A308671 A308670 * A283719 A355465 A134360

Adjacent sequences: A308568 A308569 A308570 * A308572 A308573 A308574

Keyword

nonn

Author

Seiichi Manyama, Jun 08 2019

Status

approved