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A142419 Primes congruent to 6 mod 49. 1
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 (list; graph; refs; listen; history; text; internal format)
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 * A161854 A234928 A142569

Adjacent sequences:  A142416 A142417 A142418 * A142420 A142421 A142422

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified April 1 09:25 EDT 2020. Contains 333159 sequences. (Running on oeis4.)