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 A076317 #13 Feb 16 2025 08:32:47 %S A076317 1,2,4,11,34,155,1037,12257,272513,11885351,1003932892 %N A076317 Number of 5-colorable (i.e., chromatic number <= 5) simple graphs on n nodes. %H A076317 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a> %F A076317 a(n) = A076316(n) + A076281(n). - _Andrew Howroyd_, Dec 02 2018 %Y A076317 Cf. A033995, A076281, A076315, A076316, A076318, A076319, A076320, A076321. %Y A076317 Cf. A215620 (numbers of apex graphs on n vertices). %K A076317 nonn,more %O A076317 1,2 %A A076317 _Eric W. Weisstein_, Oct 06 2002 %E A076317 a(10)-a(11) from _Andrew Howroyd_, Dec 02 2018