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A135724
Fibonacci numbers whose indices are prime Fibonacci numbers: a(n) = Fibonacci(A001605(n)).
1
1, 2, 5, 233, 1779979416004714189, 2211236406303914545699412969744873993387956988653
OFFSET
1,2
COMMENTS
The only known prime numbers in this sequence are 2, 5 and 233.
The next term (a(6)) has 334 digits. - Harvey P. Dale, Apr 28 2023
LINKS
MATHEMATICA
a = {}; b = {}; Do[If[PrimeQ[c = Fibonacci[n]], w = Fibonacci[Fibonacci[n]]; AppendTo[a, w]; AppendTo[b, n]], {n, 1, 31}]; a
Fibonacci[#]&/@Select[Fibonacci[Range[20]], PrimeQ] (* Harvey P. Dale, Apr 28 2023 *)
KEYWORD
nonn
AUTHOR
Artur Jasinski, Nov 26 2007
EXTENSIONS
Corrected by Harvey P. Dale, Apr 28 2023
STATUS
approved