A023232 - OEIS

%I #25 Sep 08 2022 08:44:47

%S 11,13,23,29,31,41,43,53,71,73,79,83,109,149,151,193,199,211,233,251,

%T 263,269,283,331,349,353,379,389,401,419,431,461,499,521,541,563,569,

%U 599,601,643,653,659,661,673,743,809,821,853,881,911,941,983,991,1009,1019,1033

%N Primes p such that 8*p + 9 is also prime.

%H Vincenzo Librandi, <a href="/A023232/b023232.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[300]],PrimeQ[8#+9]&]  (* _Harvey P. Dale_, Jan 26 2011 *)

%o (Magma) [n: n in PrimesUpTo(1100) | IsPrime(8*n+9)]; // _Vincenzo Librandi_, Nov 20 2010

%K nonn,easy

%O 1,1

%A _David W. Wilson_