A142488 Primes congruent to 20 mod 51.

71, 173, 479, 683, 887, 1091, 1193, 1499, 1601, 1907, 2111, 2213, 2417, 2621, 2927, 3539, 3947, 4049, 4253, 4457, 4967, 5171, 5273, 5477, 5783, 5987, 6089, 6599, 6701, 6803, 7109, 7211, 7517, 7823, 8231, 8537, 8741, 10067, 10169, 10271, 10781, 10883, 11087

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) ~ 32n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2400]], MemberQ[{20}, Mod[#, 51]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[20, 12000, 51], PrimeQ] (* Harvey P. Dale, May 10 2015 *)

Prog

(Magma) [p: p in PrimesUpTo(13000) | p mod 51 eq 20]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%51==20 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A278127 A044403 A044784 * A331008 A068364 A142612

Adjacent sequences: A142485 A142486 A142487 * A142489 A142490 A142491

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved