A142430 Primes congruent to 19 mod 49.

19, 313, 509, 607, 1097, 1489, 1783, 1979, 2273, 2371, 2861, 3253, 3449, 3547, 4723, 4919, 5507, 5801, 6389, 6781, 6977, 7369, 8447, 8741, 8839, 9133, 9623, 9721, 10211, 10799, 11093, 11681, 11779, 12073, 12269, 13151, 13249, 14033, 14327, 14621, 15013

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[{19}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[19, 16000, 49], PrimeQ] (* Harvey P. Dale, Aug 13 2017 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 19]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==19 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A182460 A370318 A032631 * A180845 A138943 A111420

Adjacent sequences: A142427 A142428 A142429 * A142431 A142432 A142433

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved