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 A287229 #7 Feb 16 2025 08:33:46 %S A287229 2,8,64,250,1008,7005,125979,2195964,35271470,628776316,20151270950, %T A287229 985420227285,56533288822267,3498291331182056 %N A287229 Number of independent vertex sets and vertex covers in the n-triangular honeycomb obtuse knight graph. %H A287229 Stan Wagon, <a href="http://www.jstor.org/stable/10.4169/college.math.j.45.4.278">Graph Theory Problems from Hexagonal and Traditional Chess</a>, The College Mathematics Journal, Vol. 45, No. 4, September 2014, pp. 278-287. %H A287229 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IndependentVertexSet.html">Independent Vertex Set</a> %H A287229 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/VertexCover.html">Vertex Cover</a> %K A287229 nonn,more %O A287229 1,1 %A A287229 _Eric W. Weisstein_, May 22 2017