A015968 - OEIS

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A015968

Positive integers k such that k | (15^k + 1).

1, 2, 226, 25538, 2885794, 326094722, 36848703586, 4163903505218, 470521096089634, 53168883858128642, 638026606623638426, 6008083875968536546, 6789793858544278594

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OFFSET

1,2

COMMENTS

No other terms below 10^19.

Some larger terms: 15878365178317113816706, (15^226+1)/238519527370488646998297200411598927857 (228 digits). - Max Alekseyev, Aug 03 2011

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Column k=15 of A333429.

Sequence in context: A270713 A071225 A212082 * A286447 A095220 A113800

Adjacent sequences: A015965 A015966 A015967 * A015969 A015970 A015971

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v

EXTENSIONS

a(6)-a(13) from Max Alekseyev, Oct 02 2010, Aug 03 2011, Sep 17 2017

STATUS

approved