A124081 Primes of the form 2*F(k) + 1.

3, 5, 7, 11, 17, 43, 179, 467, 8363, 21893, 35423, 92737, 392837, 204668311, 1402817467, 40730022149, 8105479075763, 15080227609492692859, 100190602496116782278655832523, 26361745652748197675264382970030251614748343

Offset: 1

Author

Giovanni Teofilatto, Dec 12 2006

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..40

Crossrefs

Cf. A000045, A124067.

Programs

Mathematica

Select[Fibonacci@Range[2,300]*2+1,PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jan 30 2012 *)

Formula

a(n) = 2*A000045(A124067(n+1)) + 1. - Amiram Eldar, Sep 19 2022