A162716 Integers k for which 2n + 1 is prime if 2n^2 + n divides 2^(kn) - 1

2, 6, 14, 26, 38, 42, 46, 58, 62, 74, 78, 82, 86, 94, 106, 114, 118, 122, 138, 142, 146, 158, 166, 174, 178, 186, 194, 202, 206, 214, 218, 222, 246, 258, 266, 274, 278, 282, 298, 302, 314, 318, 322, 326, 334, 338, 354, 358, 362, 366, 382, 386, 394, 398, 406

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Crossrefs

Cf. A000225

Sequence in context: A140759 A102486 A063620 * A138318 A212964 A279742

Adjacent sequences: A162713 A162714 A162715 * A162717 A162718 A162719

Keyword

hard,nonn

Author

Reikku Kulon, Jul 11 2009

Status

approved