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 A084274 #8 Feb 16 2025 08:32:49 %S A084274 0,0,0,1,60,4652 %N A084274 Number of labeled connected 4-chromatic (i.e., chromatic number = 4) graphs on n nodes. %H A084274 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/n-ChromaticGraph.html">n-Chromatic Graph</a> %Y A084274 Cf. A001832, A084273. %K A084274 nonn,more %O A084274 1,5 %A A084274 _Eric W. Weisstein_, May 24 2003