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 A287204 #16 Feb 16 2025 08:33:46 %S A287204 2,8,27,144,1331,13824,208575,4741632,140608000,5870657088, %T A287204 350253538649,28635764824584,3270761581689147,524882236329014264, %U A287204 117025388905265182783,36405238728128712859232,15833111238624255435917875,9599917578598545475054063616 %N A287204 Number of independent vertex sets and vertex covers in the n-triangular honeycomb acute knight graph. %C A287204 Also row sums of A244500. %H A287204 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 A287204 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IndependentVertexSet.html">Independent Vertex Set</a> %H A287204 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/VertexCover.html">Vertex Cover</a> %Y A287204 Cf. A244500 (coefficients of independence polynomial of triangular honeycomb acute knight graphs). %Y A287204 Cf. A287195, A289902, A287230, A287229, A027740. %K A287204 nonn %O A287204 1,1 %A A287204 _Eric W. Weisstein_, May 21 2017 %E A287204 a(15)-a(18) from _Andrew Howroyd_, Jul 17 2017