A175877 Positions of odd terms in A007497.

2, 4, 6, 33

Offset

1,1

Comments

Corresponding odd terms 3,7,15,564210119465811 (A175878).

Links

Table of n, a(n) for n=1..4.

Mathematica

n=2; Do[If[OddQ[n=DivisorSigma[1, n]], Print[{k, n}]], {k, 2, 99}]

Crossrefs

A007497, A175878.

Sequence in context: A056696 A045662 A195324 * A269265 A173818 A263541

Adjacent sequences: A175874 A175875 A175876 * A175878 A175879 A175880

Keyword

more,nonn

Author

Zak Seidov, Oct 07 2010

Status

approved