A176117 Primes p such that T(p) is prime in Juricevic conjecture on classification of Lehmer triples.

2, 5, 809

Offset: 1

Author

Jonathan Vos Post, Apr 08 2010

Keywords

• bref
• more
• nonn

Comments

Primes p such that A110035(2p) is prime. The value after 809 is > 2741. - R. J. Mathar, Jul 22 2010

a(4) > 15661, if it exists. - D. S. McNeil, Nov 27 2010

Links

• Robert Juricevic, Classifying Lehmer triples, Acta Arith. 137 (2009), no. 3, 207-232. MR MR2496461, doi:10.4064/aa137-3-3
• Yu Tsumura, On compositeness of special types of integers, April 8, 2010.

Crossrefs

Cf. A000040.

Formula

p such that T(p) is prime, where T(p) = (1/5)*(((1+sqrt(5))*((3+sqrt(5))/2)^(2*p)) + ((1-sqrt(5))*((3-sqrt(5))/2)^(2*p)) + 3).