A292338 Numbers k such that k^2 divides 13^k + 1.

1, 7, 203, 11977, 154553, 353423, 4482037, 9904979, 20851957, 69262991, 264440183, 6824905927, 7803226417, 17244568439, 47773414171, 57280493557, 120586867331, 197922271883, 218692031341, 249815987281, 409580786629, 460390358603, 802768833013, 963574941161, 1003238606531, 1146808373599, 1385429010959, 1529257578289

Offset: 1

Author

Max Alekseyev, Sep 16 2017

Keywords

• nonn

Links

• Max Alekseyev, Table of n, a(n) for n = 1..51

Crossrefs

Subsequence of A015963.

Cf. A128393, A177813.