A142437 Primes congruent to 27 mod 49.

223, 419, 811, 1301, 1399, 1693, 1889, 1987, 2281, 2477, 3163, 3359, 3457, 3947, 4241, 4339, 5417, 5711, 6299, 6397, 6691, 7573, 7867, 8161, 9043, 9239, 9337, 9533, 9631, 10513, 10709, 11003, 11689, 12277, 12473, 13159, 13649, 14629, 14923, 15217, 15413

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[{27}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[27, 16000, 49], PrimeQ] (* Harvey P. Dale, Aug 04 2023 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 27]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==27 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A102950 A143801 A118818 * A142773 A096660 A345198

Adjacent sequences: A142434 A142435 A142436 * A142438 A142439 A142440

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved