OFFSET
1,1
COMMENTS
Except for n = 25, all other terms n are primes. Conjecture: this sequence is infinite. - Thomas Ordowski, Jul 18 2013
MATHEMATICA
Select[Range[1000], PrimeQ[Fibonacci[5*#]/Fibonacci[#]/5]&]
PROG
(PARI) is(n)=ispseudoprime(fibonacci(5*n)/fibonacci(n)/5) \\ Charles R Greathouse IV, Nov 25 2014
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Vaclav Kotesovec, Jul 18 2013
STATUS
approved