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 A091053 #3 Mar 30 2012 16:49:51 %S A091053 1,2,3,6,9,21,33,78,129,309 %N A091053 Where records occur in A091023. %Y A091053 Cf. A091023, A091052. %K A091053 nonn,more %O A091053 1,2 %A A091053 _N. J. A. Sloane_, Feb 23 2004