A142013 Primes congruent to 9 mod 31.

71, 257, 443, 691, 877, 1063, 1187, 1249, 1373, 1559, 1621, 1931, 1993, 2179, 2551, 2861, 3109, 3853, 4349, 4597, 4721, 4783, 4969, 5279, 5527, 5651, 6271, 6581, 6829, 7573, 7759, 7883, 8069, 8317, 8627, 8689, 8999, 9371, 9433, 9619, 9743, 9929, 10177, 10301

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[Prime[Range[1500]], Mod[#, 31]==9&] (* Harvey P. Dale, Jan 27 2011 *)

Prog

(Magma)[ p: p in PrimesUpTo(17400) | p mod 31 in {9} ] // Vincenzo Librandi, Jan 28 2011
(PARI) is(n)=isprime(n) && n%31==9 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A142325 A232475 A243579 * A033240 A298103 A293395

Adjacent sequences: A142010 A142011 A142012 * A142014 A142015 A142016

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved