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 A169698 #2 Mar 30 2012 16:51:44 %S A169698 5,19,15,65,15,57,45,211,15,57,45,195,45,171,135,665,15,57,45,195,45, %T A169698 171,135,633,45,171,135,585,135,513,405,2059,15,57,45,195,45,171,135, %U A169698 633,45,171,135,585,135,513,405,1995,45,171,135,585,135,513,405,1899,135,513,405 %N A169698 A bisection of A169697. %F A169698 For formula see A169697. %K A169698 nonn %O A169698 1,1 %A A169698 _N. J. A. Sloane_, Apr 15 2010