A134580 Numbers n such that n * Fibonacci(n) - 1 is prime.

3, 4, 6, 8, 16, 18, 24, 33, 36, 94, 348, 524, 644, 1218, 1458, 2064, 2960, 3591, 5744, 13056, 27438, 35193, 43554

Offset

1,1

Comments

Some of the larger entries may only correspond to probable primes.

Links

Table of n, a(n) for n=1..23.

Mathematica

Select[Range[1, 1000], PrimeQ[#*Fibonacci[#]-1]&] (* Julien Kluge, Sep 20 2016 *)

Prog

(PARI) isok(n) = isprime(n*fibonacci(n) - 1); \\ Michel Marcus, Sep 20 2016

Crossrefs

Cf. A134313.

Sequence in context: A025073 A325432 A204659 * A007749 A063506 A084438

Adjacent sequences: A134577 A134578 A134579 * A134581 A134582 A134583

Keyword

more,nonn

Author

Jason Earls, Jan 23 2008

Status

approved