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 A243568 #14 Sep 23 2020 16:01:04 %S A243568 1,1,2,4,9,26,80,340,1690,11432,101142,1228608,20329150 %N A243568 Number of simple connected graphs with n nodes that are have no subgraph isomorphic to diamond graph or the bull graph. %H A243568 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A243568 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 29e68fa. %Y A243568 Cf. A242790 (no diamond subgraphs), A244427 (no bull subgraphs). %K A243568 nonn,more %O A243568 1,3 %A A243568 _Travis Hoppe_ and _Anna Petrone_, Jun 06 2014 %E A243568 a(11)-a(13) added using tinygraph by _Falk Hüffner_, Sep 23 2020