A141892 Primes congruent to 10 mod 21.

31, 73, 157, 199, 241, 283, 367, 409, 577, 619, 661, 787, 829, 997, 1039, 1123, 1249, 1291, 1459, 1543, 1627, 1669, 1753, 1879, 2089, 2131, 2341, 2383, 2467, 2551, 2593, 2677, 2719, 2803, 2887, 2971, 3181, 3307, 3391, 3433, 3517, 3559, 3643, 3727, 3769, 3853

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[10, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 04 2011 *)
Select[Prime[Range[600]], Mod[#, 21]==10&] (* Harvey P. Dale, Nov 20 2022 *)

Prog

(Magma) [ p: p in PrimesUpTo(5000) | p mod 21 eq 10 ]; // Vincenzo Librandi, Apr 05 2011
(PARI) is(n)=isprime(n) && n%21==10 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040, A124826.

Sequence in context: A384227 A083988 A070954 * A298613 A155933 A163428

Adjacent sequences: A141889 A141890 A141891 * A141893 A141894 A141895

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved