A023221 Primes p such that 6*p + 5 is also prime.

2, 3, 7, 11, 13, 17, 29, 31, 37, 41, 43, 59, 71, 73, 79, 83, 97, 107, 109, 113, 137, 139, 151, 157, 163, 181, 191, 193, 197, 227, 239, 241, 251, 263, 269, 277, 307, 311, 317, 337, 347, 349, 367, 373, 389, 401, 409, 421, 431, 443, 449, 479, 487, 499, 503, 541, 557, 577, 587

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[Prime[Range[1000]], PrimeQ[6 # + 5] &] (* Vincenzo Librandi, May 20 2014 *)

Prog

(Magma) [n: n in PrimesUpTo(100) | IsPrime(6*n+5)]; // Vincenzo Librandi, Nov 20 2010

Crossrefs

Subsequence of A059325.

Sequence in context: A386088 A296931 A278698 * A380075 A127430 A171595

Adjacent sequences: A023218 A023219 A023220 * A023222 A023223 A023224

Keyword

nonn,easy

Author

David W. Wilson

Status

approved