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 A126746 #12 Aug 15 2019 16:53:14 %S A126746 0,0,0,1,3,25,266,4646,136935,7121703,647596643 %N A126746 Number of connected graphs on n nodes with clique number 4. %H A126746 Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial Graph Theory</a> %Y A126746 A diagonal of triangle in A126744. %K A126746 nonn,hard,more %O A126746 1,5 %A A126746 _N. J. A. Sloane_, Feb 18 2007 %E A126746 a(11) from _Michael Sollami_, Jan 29 2012