A338370 Numbers k such that 4^k - 2^k + 1 is a strong pseudoprime to base 2 (A001262).

6, 8, 12, 16, 18, 20, 24, 36, 40, 42, 48, 54, 60, 64, 72, 80, 84, 96, 100, 108, 120, 126, 128, 136, 144, 156, 160, 162, 168, 180, 192, 200, 216, 220, 240, 252, 256, 272, 288, 294, 300, 312, 320, 324, 336, 342, 360, 378, 384, 400, 408, 420, 432, 440, 468, 480, 486

Offset: 1

Author

Davide Rotondo, Oct 23 2020

Keywords

• nonn

Comments

Apparently this sequence is A068563 \ {1, 2, 4, 32}. - Amiram Eldar, Oct 23 2020

Crossrefs

Cf. A001262, A068563.