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 A123412 #13 Sep 27 2022 12:13:08 %S A123412 1,2,4,11,32,126,546,2766,15014,88460,563440,3988355,32324527, %T A123412 314549464 %N A123412 Number of chair-free Berge perfect graphs on n nodes. %H A123412 S. Hougardy, <a href="http://www.or.uni-bonn.de/~hougardy/">Home Page</a> %H A123412 S. Hougardy, <a href="https://doi.org/10.1016/j.disc.2006.05.021">Classes of perfect graphs</a>, Discr. Math. 306 (2006), 2529-2571. %H A123412 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 3e9b2ba. %K A123412 nonn,more %O A123412 1,2 %A A123412 _N. J. A. Sloane_, Oct 18 2006 %E A123412 a(11)-a(14) added using tinygraph by _Falk Hüffner_, Jun 29 2018