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

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

Offset: 1

Author

Bobby Jacobs, Oct 21 2016

Keywords

• nonn
• hard
• more

Examples

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

Crossrefs

Cf. A000032, A000040, A123677, A123678.

Subsequence of A006450. See also A168033.

Formula

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

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