A141891 Primes congruent to 8 mod 21.

29, 71, 113, 197, 239, 281, 449, 491, 617, 659, 701, 743, 827, 911, 953, 1163, 1289, 1373, 1499, 1583, 1667, 1709, 1877, 2003, 2087, 2129, 2213, 2297, 2339, 2381, 2423, 2549, 2591, 2633, 2801, 2843, 2927, 2969, 3011, 3137, 3221, 3347, 3389, 3557, 3767, 3851

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[8, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 04 2011 *)

Prog

(Magma) [ p: p in PrimesUpTo(5000) | p mod 21 eq 8 ]; // Vincenzo Librandi, Apr 05 2011
(PARI) is(n)=isprime(n) && n%21==8 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040, A124826.

Sequence in context: A123372 A031343 A155483 * A144313 A218561 A099775

Adjacent sequences: A141888 A141889 A141890 * A141892 A141893 A141894

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved