A142604 Primes congruent to 4 mod 55.

59, 389, 499, 719, 829, 1049, 1489, 1709, 2039, 2699, 3359, 3469, 4019, 4129, 4349, 4679, 4789, 5009, 5119, 5449, 5669, 5779, 6329, 6659, 7649, 7759, 8089, 8419, 8969, 9629, 9739, 10069, 10289, 10399, 10729, 10949, 11059, 11279, 11719, 11939, 12049, 12269

Offset

1,1

Links

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

Formula

a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 04 2016

Mathematica

Select[Prime[Range[2500]], MemberQ[{4}, Mod[#, 55]] &] (* Vincenzo Librandi, Aug 30 2012 *)
Select[Range[4, 13000, 55], PrimeQ] (* Harvey P. Dale, Nov 22 2016 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 4]; // Vincenzo Librandi, Aug 30 2012
(PARI) is(n)=isprime(n) && n%55==4 \\ Charles R Greathouse IV, Jul 04 2016

Crossrefs

Cf. A000040.

Sequence in context: A290183 A118624 A244772 * A071771 A235223 A235216

Adjacent sequences: A142601 A142602 A142603 * A142605 A142606 A142607

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved