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 A243253 #12 Jan 15 2016 16:24:49 %S A243253 1,0,1,0,3,2,13,18,116,366,2306,13697 %N A243253 Number of graphs with n nodes that are chordal and Eulerian. %H A243253 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A243253 T. Hoppe and A. Petrone, <a href="http://arxiv.org/abs/1408.3644">Integer sequence discovery from small graphs</a>, arXiv preprint arXiv:1408.3644, 2014 %H A243253 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 69d4186 %Y A243253 Cf. A048192 (chordal graphs), A003049 (Eulerian graphs). %K A243253 nonn,more %O A243253 1,5 %A A243253 _Travis Hoppe_ and _Anna Petrone_, Jun 27 2014 %E A243253 a(11) and a(12) added using tinygraph by _Falk Hüffner_, Jan 15 2016