A142426 Primes congruent to 15 mod 49.

113, 211, 701, 1093, 1289, 1583, 1877, 2269, 2857, 3347, 3739, 4229, 4327, 4523, 4621, 4817, 5209, 5503, 6091, 6287, 6581, 6679, 7561, 7757, 8443, 8737, 8933, 9227, 9521, 9619, 10501, 11383, 11579, 11677, 11971, 12853, 13049, 13147, 13441, 13931, 14029

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2500]], MemberQ[{15}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 15]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==15 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A142276 A054695 A054696 * A309617 A210512 A319936

Adjacent sequences: A142423 A142424 A142425 * A142427 A142428 A142429

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved