A142187 Primes congruent to 11 mod 40.

11, 131, 211, 251, 331, 491, 571, 691, 811, 971, 1051, 1091, 1171, 1291, 1451, 1531, 1571, 1811, 1931, 2011, 2131, 2251, 2371, 2411, 2531, 2731, 2851, 2971, 3011, 3251, 3331, 3371, 3491, 3571, 3691, 3851, 3931, 4051, 4091, 4211, 4451, 4651, 4691, 4931, 5011

Offset

1,1

Links

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

Formula

a(n) ~ 16n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2000]], MemberQ[{11}, Mod[#, 40]]&] (* Vincenzo Librandi, Aug 20 2012 *)
Select[Range[11, 5500, 40], PrimeQ] (* Harvey P. Dale, Sep 13 2021 *)

Prog

(Magma) [p: p in PrimesUpTo(7000) | p mod 40 eq 11]; // Vincenzo Librandi, Aug 20 2012
(PARI) is(n)=isprime(n) && n%40==11 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A046210 A100757 A099677 * A201484 A216573 A140004

Adjacent sequences: A142184 A142185 A142186 * A142188 A142189 A142190

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved