A094320 Numbers n >= 0 such that Lehmer's polynomial 263*n^2+3 is prime.

0, 4, 14, 26, 40, 124, 130, 136, 194, 224, 250, 254, 364, 376, 410, 430, 464, 494, 536, 560, 604, 620, 640, 656, 724, 730, 794, 836, 1004, 1010, 1036, 1064, 1090, 1144, 1186, 1300, 1330, 1430, 1484, 1486, 1510, 1514, 1570, 1580, 1586, 1606, 1624, 1774, 1796, 1834

Offset

0,2

Comments

All terms == 0, 4 or 6 (mod 10). - Robert Israel, Jan 15 2016

Links

Robert Israel, Table of n, a(n) for n = 0..10000

Maple

select(n -> isprime(263*n^2+3), 2*[$0..2000]); # Robert Israel, Jan 15 2016

Mathematica

Select[Range[0, 2000], PrimeQ[263 #^2 + 3] &] (* Vincenzo Librandi, Jan 14 2016 *)

Prog

(Magma) [n: n in [0..2*10^3] |IsPrime(263*n^2+3)]; // Vincenzo Librandi, Jan 14 2016
(PARI) isok(n) = isprime(263*n^2+3); \\ Michel Marcus, Jan 14 2016

Crossrefs

See A094319 for further information.

Sequence in context: A075381 A030572 A175680 * A200546 A304342 A066907

Adjacent sequences: A094317 A094318 A094319 * A094321 A094322 A094323

Keyword

nonn

Author

N. J. A. Sloane, Jun 03 2004

Status

approved