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 A289878 #15 Feb 16 2025 08:33:49 %S A289878 1,3,14,450,55840,25886082 %N A289878 Number of maximal matchings in the n-triangular honeycomb queen graph. %H A289878 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Matching.html">Matching</a> %H A289878 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MaximalIndependentEdgeSet.html">Maximal Independent Edge Set</a> %K A289878 nonn,more %O A289878 1,2 %A A289878 _Eric W. Weisstein_, Jul 14 2017 %E A289878 a(1) corrected to 1 by _Eric W. Weisstein_, Dec 31 2017 %E A289878 a(6) = 25886082 from _Eric W. Weisstein_, Nov 26 2018