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 A289708 #20 Feb 16 2025 08:33:49 %S A289708 1,4,51,2468,516950,514413280,2620954569792 %N A289708 Number of matchings in the n-triangular honeycomb queen graph. %H A289708 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IndependentEdgeSet.html">Independent Edge Set</a> %H A289708 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Matching.html">Matching</a> %Y A289708 Cf. A011848 (matching number), A289878, A289884, A289709. %K A289708 nonn,more %O A289708 1,2 %A A289708 _Eric W. Weisstein_, Jul 14 2017 %E A289708 Name corrected by _Andrew Howroyd_, Jul 17 2017