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A132930 Concatenation of first n elements of the sigma function, where sigma(n) is the sum of divisors of n. 0
1, 13, 134, 1347, 13476, 1347612, 13476128, 1347612815, 134761281513, 13476128151318, 1347612815131812, 134761281513181228, 13476128151318122814, 1347612815131812281424, 134761281513181228142424 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Sigma function: A000203. Cf. A007908, A019518.

Sequence in context: A297335 A262572 A132935 * A130774 A179619 A019519

Adjacent sequences:  A132927 A132928 A132929 * A132931 A132932 A132933

KEYWORD

easy,nonn,base

AUTHOR

Omar E. Pol, Sep 05 2007

STATUS

approved

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Last modified September 29 13:58 EDT 2022. Contains 357090 sequences. (Running on oeis4.)