A177913 Numbers k such that k^3 divides 13^(k^2) - 1.

1, 2, 3, 4, 6, 10, 12, 14, 20, 28, 30, 34, 42, 60, 68, 70, 84, 102, 110, 114, 140, 170, 183, 204, 210, 220, 222, 228, 238, 330, 340, 366, 406, 420, 444, 476, 510, 570, 660, 714, 732, 770, 798, 812, 820, 876, 930, 942, 1010, 1020, 1110, 1140, 1190, 1218, 1428

Offset: 1

Author

Alexander Adamchuk, May 14 2010

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..2236

Crossrefs

Cf. A128393 (k^2 divides 13^k-1).

Cf. A129211, A129212, A177905, A127106, A177907, A127102, A177909, A177243.

Cf. A177911, A177912, A177913, A177914, A177915, A177916, A177917, A177918, A177919, A177920.

Programs

Mathematica

Join[{1}, Select[Range[3000000], PowerMod[13, #^2, #^3] == 1 &]] (* Robert Price, Mar 31 2020 *)