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 A216563 #12 May 02 2013 13:10:42 %S A216563 4,13,31,61,313,613,5851,7741,13963,193201,344293,387433 %N A216563 Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 5*b^2. %H A216563 Blair Kelly, <a href="http://mersennus.net/fibonacci">Factorizations of Fibonacci and Lucas numbers</a> %Y A216563 Cf. A000032, A001606. %K A216563 nonn %O A216563 1,1 %A A216563 _V. Raman_, Sep 08 2012