A023216 - OEIS

A023216

Primes p such that 4*p + 9 is also prime.

2, 5, 7, 11, 13, 23, 37, 41, 43, 47, 67, 71, 97, 103, 113, 137, 151, 163, 167, 173, 181, 191, 197, 211, 233, 251, 263, 271, 277, 293, 307, 317, 397, 401, 421, 431, 433, 463, 467, 491, 557, 571, 587, 593, 607, 617, 653, 683, 727, 757, 811, 823, 863, 877, 881, 883, 887, 907

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..4000

MATHEMATICA

Select[Prime[Range[2000]], PrimeQ[4# + 9]&] (* Vincenzo Librandi, Feb 02 2014 *)

PROG

(Magma) [n: n in [0..1000] | IsPrime(n) and IsPrime(4*n+9)]; // Vincenzo Librandi, Nov 19 2010

CROSSREFS

Sequence in context: A256396 A291280 A120330 * A079449 A236071 A038885

Adjacent sequences: A023213 A023214 A023215 * A023217 A023218 A023219