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A165724 Digit sums of A092571. 0
7, 13, 19, 55, 103, 121, 127, 163, 253, 391, 721, 793, 1063, 1441, 2719, 3313, 9595, 13045, 17863, 21889, 46243, 49891 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes in this sequence are 7, 13, 19, 103, 127,163, ....

LINKS

Table of n, a(n) for n=1..22.

Dario Alpern, Factorization using the Elliptic Curve Method

FORMULA

a(n)=1+6*A056658(n). [From R. J. Mathar, Sep 25 2009]

EXAMPLE

The digit sum of 6666666666666666666666666666666666666666661 is 253.

CROSSREFS

Cf. A056658, A092571

Sequence in context: A109558 A108106 A231506 * A144232 A154756 A024732

Adjacent sequences:  A165721 A165722 A165723 * A165725 A165726 A165727

KEYWORD

base,nonn

AUTHOR

Parthasarathy Nambi, Sep 25 2009

EXTENSIONS

More terms from R. J. Mathar, Sep 25 2009

STATUS

approved

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Last modified April 18 19:31 EDT 2021. Contains 343089 sequences. (Running on oeis4.)