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A277290 Prime-indexed primes p such that Lucas(p) is prime. 2

%I #73 Oct 29 2016 13:11:20

%S 5,11,17,31,41,353,617,4787,5851,148091,637751

%N Prime-indexed primes p such that Lucas(p) is prime.

%F a(n) = prime(A123677(n)).

%F a(n) = prime(prime(A123678(n)).

%e 17 = A000040(7), with 7 itself being a prime, and A000032(17) = 3571, a prime, thus 17 is included in this sequence.

%Y Cf. A000032, A000040, A123677, A123678.

%Y Subsequence of A006450. See also A168033.

%K nonn,hard,more

%O 1,1

%A _Bobby Jacobs_, Oct 21 2016

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Last modified March 28 17:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)