A142490 Primes congruent to 23 mod 51.

23, 227, 431, 839, 941, 1451, 1553, 2063, 2267, 2777, 2879, 3083, 3389, 3491, 3593, 3797, 4001, 4409, 4817, 4919, 5021, 5531, 5939, 6143, 6449, 6551, 6653, 6857, 6959, 7673, 7877, 8081, 8387, 8693, 8999, 9203, 10223, 10427, 10529, 10631, 10733, 10937, 11243

Offset

1,1

Links

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

Formula

a(n) ~ 32n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2400]], MemberQ[{23}, Mod[#, 51]] &] (* Vincenzo Librandi, Aug 28 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(13000) | p mod 51 eq 23]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%51==23 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A272796 A285552 A206766 * A051819 A179631 A144248

Adjacent sequences: A142487 A142488 A142489 * A142491 A142492 A142493

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved