A142420 Primes congruent to 8 mod 49.

449, 547, 743, 1429, 1723, 2017, 2213, 2311, 2801, 3389, 4271, 4663, 4957, 5153, 5741, 5839, 6133, 6329, 6427, 6917, 7211, 7309, 7603, 8093, 8191, 8387, 8681, 8779, 9661, 9857, 10151, 10739, 10837, 11131, 11621, 11719, 12503, 12601, 13679, 14071, 14561

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[{8}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)
Select[Range[8, 15000, 49], PrimeQ] (* Harvey P. Dale, Sep 14 2014 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 8]; // Vincenzo Librandi, Aug 27 2012
(PARI) is(n)=isprime(n) && n%49==8 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A345314 A107666 A020466 * A319060 A339532 A105376

Adjacent sequences: A142417 A142418 A142419 * A142421 A142422 A142423

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved