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A134580 Numbers n such that n * Fibonacci(n) - 1 is prime. 2
3, 4, 6, 8, 16, 18, 24, 33, 36, 94, 348, 524, 644, 1218, 1458, 2064, 2960, 3591, 5744, 13056, 27438, 35193, 43554 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 12 16:40 EDT 2020. Contains 336439 sequences. (Running on oeis4.)