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 A099086 #4 Mar 30 2012 16:50:04 %S A099086 1,1,5,53,1078,37622,2018305,152233518,15150569446 %N A099086 A bisection of A006966. %K A099086 nonn %O A099086 0,3 %A A099086 _N. J. A. Sloane_, Nov 15 2004