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%I #5 Mar 31 2012 14:45:08
%S 3,5,17,31,193,653,1201,46499,532159,3311233,128199521,
%T 20512526282340991,6036724301884645488192191,
%U 2170304813579195568101904406358277391153
%N Primes in the tribonacci sequence A000213.
%C Primes within A000213.
%F a(n) = A000213(A157611(n)). - R. J. Mathar, Dec 14 2011
%Y Cf. A092836.
%K nonn
%O 1,1
%A _Harvey P. Dale_, Sep 01 2000