A141897 Primes congruent to 19 mod 21.

19, 61, 103, 229, 271, 313, 397, 439, 523, 607, 691, 733, 859, 1069, 1153, 1237, 1279, 1321, 1447, 1489, 1531, 1657, 1699, 1741, 1783, 1867, 1951, 1993, 2161, 2203, 2287, 2371, 2539, 2707, 2749, 2791, 2833, 2917, 3001, 3169, 3253, 3463, 3547, 3631, 3673

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[19, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 04 2011 *)

Prog

(Magma) [ p: p in PrimesUpTo(5000) | p mod 21 eq 19 ]; // Vincenzo Librandi, Apr 05 2011
(PARI) is(n)=isprime(n) && n%21==19 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040, A124826.

Sequence in context: A211145 A338990 A158521 * A031384 A048890 A127854

Adjacent sequences: A141894 A141895 A141896 * A141898 A141899 A141900

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved