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 A119755 Indices of Fibonacci numbers in A073656, i.e., A073656(n) = F(a(n)). 0

%I #4 Jul 22 2017 23:43:52

%S 1,2,3,4,6,5,12,7,9,10,67671,11084,5271,6704,6807,6452,10587,7928,

%T 2463,80,57,8,15,16,18,20,27,22,21,124,87,32,30,11,24,13,48,23,60,19,

%U 54,52,69,44,513,148,75,38,36,29,750,259,246,53,150,83,132,73,42,40,51,14,981,284,801,964,1971,5174

%N Indices of Fibonacci numbers in A073656, i.e., A073656(n) = F(a(n)).

%C a(12) > 9800.

%e A073656(7) = 144, the 12th Fibonacci number, so a(7) = 12.

%t l = {1, 2}; Do[k = 1; While[MemberQ[l, k] || !PrimeQ[Fibonacci[Last[l]] + Fibonacci[k]], k++ ]; AppendTo[l, k]; Print[l], {n, 30}]

%Y Cf. A073656.

%K nonn

%O 1,2

%A _Ryan Propper_, Jun 17 2006

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Last modified April 13 02:05 EDT 2024. Contains 371639 sequences. (Running on oeis4.)