A142163 Primes congruent to 7 mod 39.

7, 163, 241, 397, 631, 709, 787, 1021, 1489, 1567, 1723, 1801, 1879, 2113, 2269, 2347, 2503, 2659, 2971, 3049, 3361, 3517, 3673, 3907, 4219, 4297, 4999, 5077, 5233, 5623, 5701, 5779, 5857, 6091, 6247, 6481, 6637, 6793, 6871, 6949, 7027, 7417, 7573, 7963

Offset

1,1

Links

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

Formula

a(n) ~ 24n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[3000]], MemberQ[{7}, Mod[#, 39]]&] (* Vincenzo Librandi, Aug 19 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(9000) | p mod 39 eq 7 ]; // Vincenzo Librandi, Aug 19 2012
(PARI) is(n)=isprime(n) && n%39==7 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A160454 A217241 A317727 * A201179 A218998 A220921

Adjacent sequences: A142160 A142161 A142162 * A142164 A142165 A142166

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved