A141896 Primes congruent to 17 mod 21.

17, 59, 101, 227, 269, 311, 353, 479, 521, 563, 647, 773, 857, 941, 983, 1109, 1151, 1193, 1277, 1319, 1361, 1487, 1571, 1613, 1697, 1823, 1907, 1949, 2243, 2411, 2579, 2621, 2663, 2789, 2957, 2999, 3041, 3083, 3167, 3209, 3251, 3461, 3671, 3797, 3881, 3923

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[Range[17, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 04 2011 *)

Prog

(Magma) [ p: p in PrimesUpTo(5000) | p mod 21 eq 17 ]; // Vincenzo Librandi, Apr 05 2011
(PARI) is(n)=isprime(n) && n%21==17 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040, A124826.

Sequence in context: A106922 A110092 A360155 * A104165 A031391 A176783

Adjacent sequences: A141893 A141894 A141895 * A141897 A141898 A141899

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved