%I A118305
%S A118305 1,2,6,16,5436,6238
%N A118305 Numbers n such that 3*n^n-1 is prime.
%C A118305 Six terms found and primes proved by PrimeForm ([N+1, Brillhart-Lehmer-Selfridge]). 
               3*6238^6238-1 has 23674 digits. No more terms <= 8800.
%Y A118305 Cf. A118306, A110931.
%Y A118305 Sequence in context: A147932 A147923 A144690 this_sequence A139629 A057497 
               A063627
%Y A118305 Adjacent sequences: A118302 A118303 A118304 this_sequence A118306 A118307 
               A118308
%K A118305 hard,more,nonn
%O A118305 1,2
%A A118305 Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 22 2006