%I A112881
%S A112881 2,3,4,5,6,7,10,12,20,21,24,34,38,75,122,166,236,355,356,930,1042,1214,
%T A112881 1461,1622,4430,5802,9092,16260,18926,23698,40059,45003,73807,91405,
%U A112881 263226,316872,321874,324098
%N A112881 Indices of prime Perrin numbers; values of n such that A001608(n) is 
               prime.
%H A112881 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PerrinSequence.html">Perrin Sequence</a>
%H A112881 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               IntegerSequencePrimes.html">Integer Sequence Primes</a>
%Y A112881 Cf. A001608, A074788.
%Y A112881 Sequence in context: A018444 A032378 A164947 this_sequence A008814 A005140 
               A017845
%Y A112881 Adjacent sequences: A112878 A112879 A112880 this_sequence A112882 A112883 
               A112884
%K A112881 nonn,more
%O A112881 1,1
%A A112881 Eric Weisstein (eric(AT)weisstein.com), Oct 05, 2005
%E A112881 a(34) from Eric Weisstein (eric(AT)weisstein.com), Oct 6, 2005)
%E A112881 a(35) = 263226 from Eric Weisstein (eric(AT)weisstein.com), May 04, 2006
%E A112881 a(36) = 316872 from Eric Weisstein (eric(AT)weisstein.com), Feb 04, 2007
%E A112881 a(37) = 321874 from Eric Weisstein (eric(AT)weisstein.com), Feb 19, 2007
%E A112881 a(38) = 324098 from Eric Weisstein (eric(AT)weisstein.com), Feb 25, 2007