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%I #11 Sep 08 2022 08:45:50
%S 2,5,7,29,37,79,89,97,107,109,127,139,149,197,229,239,277,317,379,397,
%T 487,499,509,557,587,599,607,757,769,887,907,1019,1049,1069,1097,1297,
%U 1307,1439,1499,1559,1567,1609,1619,1637,1667,1709,1759,1847,1979,1997
%N Primes p such that p and 3*p^2+3*p-1 are both prime.
%H Vincenzo Librandi, <a href="/A171831/b171831.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime[Range[500]],PrimeQ[3#^2+3#-1]&] (* _Harvey P. Dale_, Jul 24 2011 *)
%o (Magma) [p: p in PrimesUpTo(2000) | IsPrime(3*p^2+3*p-1)]; // _Vincenzo Librandi_, Dec 31 2013
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Dec 19 2009
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