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A175877 Positions of odd terms in A007497. 2
2, 4, 6, 33 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 15 19:32 EST 2021. Contains 340189 sequences. (Running on oeis4.)