A141971 Primes congruent to 15 mod 28.

43, 71, 127, 211, 239, 379, 463, 491, 547, 631, 659, 743, 827, 883, 911, 967, 1051, 1163, 1303, 1471, 1499, 1583, 1667, 1723, 2003, 2087, 2143, 2311, 2339, 2423, 2591, 2647, 2731, 2843, 2927, 3011, 3067, 3319, 3347, 3571, 3739, 3767, 3823, 3851, 3907, 4019

Offset

1,1

Links

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

Formula

a(n) ~ 12n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[600]], Mod[#, 28]==15&] (* Harvey P. Dale, Nov 01 2011 *)

Prog

(Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 15 ]; // Vincenzo Librandi, Aug 17 2012
(PARI) is(n)=isprime(n) && n%28==15 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A146355 A175730 A087765 * A144974 A144975 A087699

Adjacent sequences: A141968 A141969 A141970 * A141972 A141973 A141974

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved