A141893 Primes congruent to 11 mod 21.

11, 53, 137, 179, 263, 347, 389, 431, 557, 599, 641, 683, 809, 977, 1019, 1061, 1103, 1187, 1229, 1439, 1481, 1523, 1607, 1733, 1901, 2027, 2069, 2111, 2153, 2237, 2447, 2531, 2657, 2699, 2741, 2909, 3119, 3203, 3329, 3371, 3413, 3539, 3581, 3623, 3833, 3917

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 02 2016

Mathematica

Select[Range[11, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 04 2011 *)

Prog

(Magma) [ p: p in PrimesUpTo(5000) | p mod 21 eq 11 ]; // Vincenzo Librandi, Apr 05 2011
(PARI) is(n)=isprime(n) && n%21==11 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040, A124826.

Sequence in context: A178453 A225582 A164580 * A093198 A207361 A093864

Adjacent sequences: A141890 A141891 A141892 * A141894 A141895 A141896

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved