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 A289876 #9 Feb 16 2025 08:33:49 %S A289876 1,7,57,973,32057,2079303,267612891,68648459435,35172685493889 %N A289876 Number of dominating sets in the n-triangular honeycomb queen graph. %H A289876 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DominatingSet.html">Dominating Set</a> %Y A289876 Cf. A229803, A289865, A290717, A304556. %K A289876 nonn,more %O A289876 1,2 %A A289876 _Eric W. Weisstein_, Jul 14 2017 %E A289876 a(8)-a(9) from _Andrew Howroyd_, May 19 2018