Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 5*b^2.

A216563

Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 5*b^2.

Terms

    a(0) =4a(1) =13a(2) =31a(3) =61a(4) =313a(5) =613a(6) =5851a(7) =7741a(8) =13963a(9) =193201a(10) =344293a(11) =387433

External references