%I A138048
%S A138048 0,1,2,4,5,10,11,16,20,52,75,106,112,132,371
%N A138048 Numbers n such that 15^n + 2 is prime.
%C A138048 One further term, 10365, was found by Lelio R Paula in 2006 - see the 
               PRP Records link.
%H A138048 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/
               searchform.php?form=15%5En%2B2&action=Search">PRP Records</a>.
%t A138048 Do[ f = 15^n + 2; If[ PrimeQ[ f ], Print[ {n, f} ] ], {n, 1, 371} ]
%Y A138048 Cf. A051783 = Numbers n such that 3^n + 2 is prime. Cf. A087885 = Numbers 
               n such that 5^n + 2 is prime. Cf. A090649, A109076, A113480, A138049, 
               A138050, A138051, A087886, A138052, A138053, A138054, A138055, A138056, 
               A138057, A138058, A138059, A138060, A113481.
%Y A138048 Sequence in context: A003278 A004792 A167795 this_sequence A057762 A109511 
               A018339
%Y A138048 Adjacent sequences: A138045 A138046 A138047 this_sequence A138049 A138050 
               A138051
%K A138048 hard,more,nonn
%O A138048 1,3
%A A138048 Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 02 2008