A141950 Primes congruent to 4 mod 27.

31, 139, 193, 409, 463, 571, 733, 787, 1327, 1381, 1489, 1543, 1597, 1759, 1867, 2029, 2083, 2137, 2677, 2731, 3001, 3109, 3163, 3217, 3271, 3433, 3541, 3919, 4027, 4243, 4297, 4513, 4567, 4621, 4729, 4783, 4999, 5107, 5323, 5431, 5647, 5701, 6079, 6133

Offset

1,1

Links

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

Formula

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[800]], MemberQ[{4}, Mod[#, 27]] &] (* Vincenzo Librandi, Aug 16 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 4 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%27==4 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040,

Sequence in context: A123236 A142561 A165568 * A201960 A182916 A233303

Adjacent sequences: A141947 A141948 A141949 * A141951 A141952 A141953

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved