A142269 Primes congruent to 20 mod 43.

149, 751, 1009, 1181, 1439, 1697, 1783, 2213, 2557, 2729, 3331, 3761, 3847, 4019, 4363, 4621, 4793, 5051, 5309, 5653, 6427, 6599, 6857, 7459, 7717, 8147, 8233, 8663, 9007, 9437, 9781, 10039, 10211, 11071, 11243, 11329, 11587, 12619, 12791, 13049, 14081

Offset

1,1

Links

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

Formula

a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 02 2016

Mathematica

Select[Prime[Range[5000]], MemberQ[{20}, Mod[#, 43]] &] (* Vincenzo Librandi, Aug 25 2012 *)
Select[Range[20, 15000, 43], PrimeQ] (* Harvey P. Dale, Jun 04 2021 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 43 eq 20 ]; // Vincenzo Librandi, Aug 25 2012
(PARI) is(n)=isprime(n) && n%43==20 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040, A144562.

Sequence in context: A078849 A078950 A251313 * A177850 A158717 A243530

Adjacent sequences: A142266 A142267 A142268 * A142270 A142271 A142272

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved