A142152 Primes congruent to 21 mod 38.

59, 97, 173, 211, 401, 439, 743, 857, 971, 1009, 1123, 1237, 1427, 1579, 1693, 1997, 2111, 2339, 2377, 2719, 2833, 2909, 3023, 3061, 3137, 3251, 3517, 3593, 3631, 3821, 4049, 4201, 4391, 4657, 4733, 4999, 5113, 5189, 5227, 5303, 5417, 5531, 5569, 5683, 5987

Offset

1,1

Links

Enrique Pérez Herrero, Table of n, a(n) for n = 1..2500

Formula

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 02 2016

Mathematica

isA142152[n_]:=(Mod[n, 38]==21)&&(PrimeQ[n])
Select[Prime[Range[1000]], Mod[#, 38]==21&]
Select[Range[21, 6000, 38], PrimeQ] (* Harvey P. Dale, Nov 06 2019 *)

Prog

(Magma)[p: p in PrimesUpTo(7000) | p mod 38 eq 21 ]; // Vincenzo Librandi, Aug 19 2012
(PARI) is(n)=isprime(n) && n%38==21 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040.

Sequence in context: A039431 A043254 A044034 * A112804 A240339 A199977

Adjacent sequences: A142149 A142150 A142151 * A142153 A142154 A142155

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved