%I #10 Sep 08 2022 08:45:41
%S 2,5,11,17,19,31,37,41,47,61,67,79,89,97,101,107,131,137,149,151,157,
%T 179,191,197,199,211,239,241,251,277,281,307,317,347,367,401,419,421,
%U 431,439,449,457,461,479,487,499,509,541,547,577,599,607,617,619,647
%N Primes p such that 8*p+21 is prime.
%H Vincenzo Librandi, <a href="/A156004/b156004.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime[Range[1000]], PrimeQ[8 # + 21] &] (* _Vincenzo Librandi_, Oct 14 2012 *)
%o (Magma) [p: p in PrimesUpTo(700)|IsPrime(8*p+21)]; // _Vincenzo Librandi_, Oct 14 2012
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Feb 01 2009