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 A243331 #8 Sep 14 2014 23:45:43 %S A243331 1,1,1,2,2,4,4,12,9,19 %N A243331 Number of simple connected graphs with n nodes that are integral and planar. %H A243331 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A243331 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 %Y A243331 Cf. A003094 (planar graphs), A064731 (integral graphs). %K A243331 nonn,more %O A243331 1,4 %A A243331 _Travis Hoppe_ and _Anna Petrone_, Jun 03 2014