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%I #35 Mar 16 2023 11:25:39
%S 2,17,107,647,23327,139967,30233087,6530347007,39182082047,
%T 14215144014964850687,240614901699187213221099227578367,
%U 53193679461858262403856737876228196870083927814929645567
%N Primes of the form 3*6^n - 1.
%H Charles R Greathouse IV, <a href="/A186104/b186104.txt">Table of n, a(n) for n = 1..21</a>
%o (Magma) [3*6^n-1: n in [0..140] | IsPrime(3*6^n-1)]; // _Bruno Berselli_, Feb 12 2011
%o (PARI) v=[];for(n=0,1e3,if(ispseudoprime(k=3*6^n-1),v=concat(v,k)));v \\ _Charles R Greathouse IV_, Jul 26 2011
%Y For the exponents n see A186106.
%K nonn
%O 1,1
%A _Gilbert Mozzo_, Feb 12 2011
%E Edited by _N. J. A. Sloane_, Feb 12 2011
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