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 A243556 #13 Sep 14 2014 23:52:57 %S A243556 1,1,1,2,1,3,2,3,0,14 %N A243556 Number of simple connected graphs with n nodes that are integral and have no subgraph isomorphic to bull graph. %H A243556 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A243556 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 A243556 Cf. A244427 (no bull subgraphs), A064731 (integral graphs). %K A243556 nonn,more %O A243556 1,4 %A A243556 _Travis Hoppe_ and _Anna Petrone_, Jun 06 2014