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A112881 Indices of prime Perrin numbers; values of n such that A001608(n) is prime. 1

%I

%S 2,3,4,5,6,7,10,12,20,21,24,34,38,75,122,166,236,355,356,930,1042,

%T 1214,1461,1622,4430,5802,9092,16260,18926,23698,40059,45003,73807,

%U 91405,263226,316872,321874,324098,581132

%N Indices of prime Perrin numbers; values of n such that A001608(n) is prime.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PerrinSequence.html">Perrin Sequence</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>

%Y Cf. A001608, A074788.

%K nonn,more

%O 1,1

%A _Eric W. Weisstein_, Oct 05 2005

%E a(34) from _Eric W. Weisstein_, Oct 06 2005

%E a(35) = 263226 from _Eric W. Weisstein_, May 04 2006

%E a(36) = 316872 from _Eric W. Weisstein_, Feb 04 2007

%E a(37) = 321874 from _Eric W. Weisstein_, Feb 19 2007

%E a(38) = 324098 from _Eric W. Weisstein_, Feb 25 2007

%E a(39) = 581132 from _Eric W. Weisstein_, Feb 15 2011

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Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)