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 A076279 #22 Feb 16 2025 08:32:47 %S A076279 0,0,1,3,16,84,579,5721,87381,2104349,78315231,4383566676,362178638727 %N A076279 Number of 3-chromatic (i.e., chromatic number equals 3) simple graphs on n nodes. %H A076279 Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial Graph Theory</a> %H A076279 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ChromaticGraph.html">n-Chromatic Graph</a> %Y A076279 Column k=3 of A084268. %Y A076279 Cf. A076278, A076280, A076281, A076282, A115597. %K A076279 nonn,more %O A076279 1,4 %A A076279 _Eric W. Weisstein_, Oct 06 2002 %E A076279 a(10) from _Keith Briggs_, Mar 14 2006 %E A076279 a(11) from _Michael Sollami_, Jan 28 2012 %E A076279 a(12)-a(13) from _Brendan McKay_, Nov 08 2022