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 A216537 #12 May 02 2013 13:07:05 %S A216537 0,4,5,7,16,17,19,37,53,71,113,353,503,613,1361,4787,8467,10691,14449, %T A216537 19649,51169,56003,81671,94823,159521,183089,193201,344293,532277, %U A216537 616787,637751,692147 %N A216537 Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 7*b^2. %H A216537 Blair Kelly, <a href="http://mersennus.net/fibonacci">Factorizations of Fibonacci and Lucas numbers</a> %Y A216537 Cf. A000032, A001606. %K A216537 nonn %O A216537 1,2 %A A216537 _V. Raman_, Sep 08 2012