A141952 Primes congruent to 7 mod 27.

7, 61, 223, 277, 331, 439, 547, 601, 709, 1033, 1087, 1249, 1303, 1627, 1789, 1951, 2113, 2221, 2383, 2437, 2707, 3301, 3463, 3517, 3571, 3733, 4003, 4057, 4111, 4219, 4273, 4327, 4597, 4651, 4759, 4813, 5407, 5569, 5623, 5839, 6163, 6217, 6271, 6379, 6703

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[900]], MemberQ[{7}, Mod[#, 27]] &]
(* Vincenzo Librandi, Aug 16 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 7 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%27==7 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A079672 A173880 A100698 * A289723 A064398 A275878

Adjacent sequences: A141949 A141950 A141951 * A141953 A141954 A141955

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved