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Numbers n such that the n-th Fibonacci number is prime and can be written in the form a^2 + 5*b^2.
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%I #12 May 02 2013 13:11:10

%S 11,29,131,359,431,449,509,569,571,2971,9311,14431,25561,35999,37511,

%T 81839,104911,130021,148091,397379,433781,590041,593689,604711,

%U 1803059,1968721

%N Numbers n such that the n-th Fibonacci number is prime and can be written in the form a^2 + 5*b^2.

%H Blair Kelly, <a href="http://mersennus.net/fibonacci">Factorizations of Fibonacci and Lucas numbers</a>

%Y Cf. A000045, A001605.

%K nonn

%O 1,1

%A _V. Raman_, Sep 08 2012