A142270 Primes congruent to 21 mod 43.

107, 193, 709, 881, 967, 1483, 1741, 1913, 1999, 2687, 3203, 3461, 3547, 3719, 4493, 4751, 5009, 5783, 5869, 6299, 7159, 7331, 7417, 7589, 7933, 8191, 8363, 8707, 9137, 9739, 10169, 10427, 10513, 10771, 11287, 11717, 12491, 12577, 13007, 13093, 13523

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 03 2016

Mathematica

Select[Prime[Range[5000]], MemberQ[{21}, Mod[#, 43]]&] (* Vincenzo Librandi, Aug 25 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 43 eq 21 ]; // Vincenzo Librandi, Aug 25 2012
(PARI) is(n)=isprime(n) && n%43==21 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A265915 A210361 A250147 * A044339 A044720 A134297

Adjacent sequences: A142267 A142268 A142269 * A142271 A142272 A142273

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved