A177915 Numbers k such that k^3 divides 15^(k^2) - 1.

1, 2, 4, 7, 8, 14, 16, 28, 56, 68, 112, 136, 226, 272, 406, 452, 476, 812, 904, 952, 1582, 1624, 1808, 1904, 2056, 2758, 3164, 3248, 4112, 5516, 5956, 6328, 7684, 9316, 11032, 11912, 12656, 13804, 14392, 15368, 18632, 21512, 22064, 23824, 23954, 25144

Offset

1,2

Links

Robert Price, Table of n, a(n) for n = 1..205

Mathematica

Join[{1}, Select[Range[30000], PowerMod[15, #^2, #^3] == 1 &]] (* Robert Price, Apr 04 2020 *)

Crossrefs

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

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

Sequence in context: A018461 A018341 A018645 * A018289 A128395 A018740

Adjacent sequences: A177912 A177913 A177914 * A177916 A177917 A177918

Keyword

nonn

Author

Alexander Adamchuk, May 14 2010

Status

approved