A142017 Primes congruent to 13 mod 31.

13, 137, 199, 509, 571, 757, 881, 1129, 1439, 1811, 1873, 1997, 2617, 2741, 2803, 2927, 3299, 3361, 3547, 3671, 3733, 3919, 4229, 4663, 4787, 4973, 5407, 5531, 5717, 5779, 5903, 6089, 6151, 6337, 6709, 6833, 7019, 7577, 7639, 7949, 8011, 8693, 8941, 9127

Offset

1,1

Links

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

Formula

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Range[13, 20000, 31], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 20 2011 *)

Prog

(Magma) [ p: p in PrimesUpTo(30000) | p mod 31 eq 13 ]; // Vincenzo Librandi, Apr 20 2011
(PARI) is(n)=isprime(n) && n%31==13 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040, A142005, A142006.

Sequence in context: A065550 A078795 A123299 * A157950 A249444 A046278

Adjacent sequences: A142014 A142015 A142016 * A142018 A142019 A142020

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved