%I A006033 M3150
%S A006033 3,43,73,487,2579,8741,37441
%N A006033 Numbers n such that (15^n - 1)/14 is prime.
%C A006033 8741 and 37441 are only probable primes. - Julien Peter Benney (jpbenney(AT)ftml.net), 
               Apr 27 2007
%D A006033 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006033 H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927-930.
%D A006033 Ribenboim, Paulo; "The Book Of Prime Number Records"; published 1989 
               by Springer-Verlag; pages 350-354.
%H A006033 H. Lifchitz, <a href="http://www.primenumbers.net/Henri/us/MersFermus.htm">
               Mersenne and Fermat primes field</a>
%e A006033 (15^3-1)/14 = 241, which is prime.
%t A006033 lst={};Do[If[PrimeQ[(15^n-1)/14], Print[n];AppendTo[lst, n]], {n, 10^5}];
               lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 21 2008]
%Y A006033 Cf. A083402, A058808, A059802, A002551, A062647, A003525.
%Y A006033 Sequence in context: A137192 A059802 A139854 this_sequence A142184 A002551 
               A127930
%Y A006033 Adjacent sequences: A006030 A006031 A006032 this_sequence A006034 A006035 
               A006036
%K A006033 nonn
%O A006033 1,1
%A A006033 N. J. A. Sloane (njas(AT)research.att.com).
%E A006033 One more term from Julien Peter Benney (jpbenney(AT)ftml.net), Apr 27 
               2007