A142414 Primes congruent to 1 mod 49.

197, 491, 883, 1373, 1471, 1667, 2549, 2647, 2843, 3137, 3529, 3823, 4019, 4999, 5783, 5881, 6469, 6763, 6959, 7057, 7253, 7351, 7547, 7841, 8233, 8429, 8527, 8821, 9311, 10193, 10487, 10781, 11173, 11369, 11467, 12251, 13721, 14407, 14897, 15289, 15583

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[{1}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)
Select[Range[1, 16000, 49], PrimeQ] (* Harvey P. Dale, Nov 12 2013 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 1]; // Vincenzo Librandi, Aug 27 2012
(PARI) is(n)=isprime(n) && n%49==1 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A142568 A188336 A142230 * A142812 A347225 A204844

Adjacent sequences: A142411 A142412 A142413 * A142415 A142416 A142417

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved