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 A126747 #11 Aug 15 2019 16:53:36 %S A126747 0,0,0,0,1,4,45,785,26205,1696407,209046708 %N A126747 Number of connected graphs on n nodes with clique number 5. %H A126747 Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial Graph Theory</a> %Y A126747 A diagonal of triangle in A126744. %K A126747 nonn,hard,more %O A126747 1,6 %A A126747 _N. J. A. Sloane_, Feb 18 2007 %E A126747 a(11) from _Michael Sollami_, Jan 29 2012