A142419 Primes congruent to 6 mod 49.

251, 349, 643, 839, 937, 1231, 1427, 1721, 2113, 2309, 2897, 3191, 3583, 3779, 3877, 4073, 4759, 5347, 5641, 6131, 6229, 6719, 7013, 7307, 7699, 7993, 8287, 8581, 9463, 10247, 10639, 11423, 11717, 12011, 12109, 12697, 12893, 13187, 13873, 14461, 14657

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[{6}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)
Select[Range[6, 15000, 49], PrimeQ] (* Harvey P. Dale, Oct 23 2015 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 6]; // Vincenzo Librandi, Aug 27 2012
(PARI) is(n)=isprime(n) && n%49==6 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A165281 A033449 A271581 * A364968 A161854 A234928

Adjacent sequences: A142416 A142417 A142418 * A142420 A142421 A142422

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved