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 A139539 #2 Mar 31 2012 10:22:09 %S A139539 19,29,34,35,55,64,69,85,89,104,115,119,129,149,150,155,174,180,189, %T A139539 199,250,255,259,265,269,289,324,335,344,350,370,405,409,425,454,460, %U A139539 489,490,510,539,540,544,565,579,580,609,614,624,629,630,639,675,680,684 %N A139539 Indices of numbers of form 12k+1 which are prime and have representation x^2+32xy+y^2. %Y A139539 Cf. A068228, A139512. %K A139539 nonn %O A139539 1,1 %A A139539 _Artur Jasinski_, Apr 25 2008