A015968 Positive integers k such that k | (15^k + 1).

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

Offset: 1

Author

Robert G. Wilson v

Keywords

• nonn
• more

Comments

No other terms below 10^19.

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

Crossrefs

Column k=15 of A333429.

Extensions

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