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 A297472 #11 Feb 16 2025 08:33:52 %S A297472 1,1,5,30,1140,69136,33666336,27406992000,234805387040640, %T A297472 3472530332565934080,660908229459858361516032, %U A297472 217930756388573091682145009664 %N A297472 Number of maximal matchings in the n X n black bishop graph. %H A297472 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BlackBishopGraph.html">Black Bishop Graph</a> %H A297472 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Matching.html">Matching</a> %H A297472 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MaximalIndependentEdgeSet.html">Maximal Independent Edge Set</a> %Y A297472 Cf. A286422, A297471, A297490. %K A297472 nonn,more %O A297472 1,3 %A A297472 _Eric W. Weisstein_, Dec 30 2017 %E A297472 a(7)-a(12) from _Andrew Howroyd_, Dec 30 2017