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 A076315 #16 Feb 16 2025 08:32:47 %S A076315 1,2,4,10,29,119,667,6024,88500,2109828,78347534,4383817811, %T A076315 362181166439 %N A076315 Number of 3-colorable (i.e., chromatic number <= 3) simple graphs on n nodes. %H A076315 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a> %F A076315 a(n) = A033995(n) + A076279(n). - _Andrew Howroyd_, Dec 02 2018 %Y A076315 Cf. A033995, A076279, A076316, A076317, A076318, A076319, A076320, A076321. %K A076315 nonn,more %O A076315 1,2 %A A076315 _Eric W. Weisstein_, Oct 06 2002 %E A076315 a(10)-a(11) from _Andrew Howroyd_, Dec 02 2018 %E A076315 a(12) from _Brendan McKay_, Jan 19 2020 %E A076315 a(13) from _Brendan McKay_, Nov 08 2022