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 A084279 #21 Feb 16 2025 08:32:49 %S A084279 1,2,8,63,958,27554,1457047,137144754,22249524024,6032417530135, %T A084279 2663111111716110,1876540387225350958 %N A084279 Number of labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes. %H A084279 Steven R. Finch, <a href="http://www.people.fas.harvard.edu/~sfinch/">Bipartite, k-colorable and k-colored graphs</a> %H A084279 Steven R. Finch, <a href="/A191371/a191371.pdf">Bipartite, k-colorable and k-colored graphs</a>, June 5, 2003. [Cached copy, with permission of the author] %H A084279 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 8c665c7 %H A084279 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a> %Y A084279 Cf. A047864, A084280, A084281, A084282. %K A084279 nonn,more %O A084279 1,2 %A A084279 _Eric W. Weisstein_, May 25 2003 %E A084279 a(7)-a(12) added using tinygraph by _Falk Hüffner_, Jun 20 2018