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 A084281 #17 Feb 16 2025 08:32:49 %S A084281 1,2,8,64,1024,32767,2096731,268232643,68572495926,35005772219631, %T A084281 35642624717803839 %N A084281 Number of labeled 5-colorable (i.e., chromatic number <= 5) graphs on n nodes. %H A084281 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 8c665c7 %H A084281 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a> %Y A084281 Cf. A047864, A084279, A084280, A084282. %K A084281 nonn,more %O A084281 1,2 %A A084281 _Eric W. Weisstein_, May 25 2003 %E A084281 a(7)-a(11) added using tinygraph by _Falk Hüffner_, Jun 20 2018