A142433 Primes congruent to 23 mod 49.

23, 317, 709, 1297, 1493, 1787, 2081, 2179, 2473, 2767, 2963, 3061, 3257, 3943, 4139, 5021, 5119, 5413, 5903, 6197, 6491, 6883, 7079, 7177, 8059, 8353, 8647, 8941, 9137, 9431, 10313, 10607, 11489, 11587, 11783, 12763, 12959, 13841, 14723, 14821, 15017

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 02 2016

Mathematica

Select[Prime[Range[2500]], MemberQ[{23}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[23, 16000, 49], PrimeQ] (* Harvey P. Dale, Sep 13 2018 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 23]; // Vincenzo Librandi; Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==23 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040.

Sequence in context: A090927 A045530 A080188 * A234234 A125458 A329164

Adjacent sequences: A142430 A142431 A142432 * A142434 A142435 A142436

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved