%I #10 May 15 2023 14:24:05
%S 19,109,3889,139969,839809,5038849,1088391169,1410554953729,
%T 511745184538734624769,110536959860366678949889,
%U 2424843832394292181929418801369608880129
%N Primes of the form 3*6^n+1.
%C The values of n (1,2,4,6,7,8,11,15,26,29,50) are in A186112.
%e 3*6^15+1 = 1410554953729 is prime.
%Y Cf. A186112.
%K nonn
%O 1,1
%A _Gilbert Mozzo_, Feb 12 2011
