This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A121605 #2 Mar 31 2012 13:20:27
%S A121605 5,7,23,379,17713,102334157,3416454622906709,1100087778366101933,
%T A121605 468340976726457153752543329995931,
%U A121605 40934782466626840596168752972961528246149
%N A121605 Primes of the form (Fibonacci[n+3] + 2) = A018910[n], Pisot sequence L(4,5).
%C A121605 a(n) = Fibonacci[A121606[n] + 3 ] + 2. Indices n = {1,2,5,11,19,37,73,85,155,193,227,233,257,785,797,1277,2371,2771,...} corresponding to prime A018910[n] = (Fibonacci[n+3] + 2) are listed in A121606[n].
%t A121605 Select[Table[Fibonacci[n+3]+2,{n,1,300}],PrimeQ]
%Y A121605 Cf. A121606, A018910, A048584.
%K A121605 nonn
%O A121605 1,1
%A A121605 _Alexander Adamchuk_, Aug 09 2006