1,1

Numbers n such that Lucas[Prime[n]] is prime are listed in A120561[n] = {1,3,4,5,6,7,8,11,12,13,15,16,18,20,22,30,65,71,96,112,113,...}. a(n) are the primes in A120561[n]. Indices of prime Lucas numbers are listed in A001606[n] = {0,2,4,5,7,8,11,13,16,17,19,31,37,41,47,53,61,71,79,113,...}.

a(n) = Prime[ A123678[n] ].

Cf. A000032, A123678, A120561, A001606, A119984, A122534.

Sequence in context: A038979 A093988 A108817 this_sequence A133954 A087325 A072151

Adjacent sequences: A123674 A123675 A123676 this_sequence A123678 A123679 A123680

hard,more,nonn

Alexander Adamchuk (alex(AT)kolmogorov.com), Oct 05 2006