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 A289865 #8 Feb 16 2025 08:33:49 %S A289865 1,7,54,928,31244,2057356,266631188 %N A289865 Number of connected dominating sets in the n-triangular honeycomb queen graph. %H A289865 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConnectedDominatingSet.html">Connected Dominating Set</a> %Y A289865 Cf. A289874, A289876. %K A289865 nonn,more %O A289865 1,2 %A A289865 _Eric W. Weisstein_, Jul 13 2017 %E A289865 a(7) from _Andrew Howroyd_, Sep 04 2017