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 A079574 #21 Jun 11 2021 05:12:46 %S A079574 1,1,2,5,17,82,536,5606,95915,2784072,135885572,10977061102, %T A079574 1448150962596 %N A079574 Number of unlabeled, connected graphs on n vertices with no induced subgraph isomorphic to a K_4, where a K_4 is the complete graph on four vertices. %D A079574 Inverse EULER transform of A304124. %H A079574 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 332a754 %K A079574 nonn,more %O A079574 1,3 %A A079574 _Jim Nastos_, Jan 24 2003 %E A079574 a(10) from the Encyclopedia of Finite Graphs (_Travis Hoppe_ and _Anna Petrone_), Apr 11 2014 %E A079574 a(11) and a(12) added using tinygraph by _Falk Hüffner_, Jan 14 2016 %E A079574 a(13) from _Brendan McKay_, Jun 11 2021