A142418 Primes congruent to 5 mod 49.

5, 103, 397, 593, 691, 887, 1181, 1279, 1867, 2063, 2161, 2357, 2749, 3533, 3631, 4219, 4513, 5003, 5101, 5297, 5591, 5689, 6277, 6473, 6571, 7159, 7649, 8237, 8629, 8923, 9413, 9511, 10099, 10589, 10687, 10883, 11177, 11471, 11863, 12157, 12451, 12647

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[{5}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)
Select[Range[5, 13000, 49], PrimeQ] (* Harvey P. Dale, Jan 18 2017 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 5]; // Vincenzo Librandi, Aug 27 2012
(PARI) is(n)=isprime(n) && n%49==5 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A266903 A052138 A308459 * A159523 A172116 A007619

Adjacent sequences: A142415 A142416 A142417 * A142419 A142420 A142421

Keyword

nonn,easy,changed

Author

N. J. A. Sloane, Jul 11 2008

Status

approved