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 A288721 #11 Feb 16 2025 08:33:48 %S A288721 1,7,32,296,5744,227080,18084720,2883751336,916819998880, %T A288721 579403471332808,726271886301488352,1802717127912019473096, %U A288721 8849500619057758939673040,85830556827312530479498758296,1643431935596454045971815328866560,62082178562357221739454020443666212184 %N A288721 Number of connected dominating sets in the n-triangular grid graph. %H A288721 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConnectedDominatingSet.html">Connected Dominating Set</a> %H A288721 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TriangularGridGraph.html">Triangular Grid Graph</a> %Y A288721 Cf. A287064, A288722. %K A288721 nonn %O A288721 0,2 %A A288721 _Eric W. Weisstein_, Jun 14 2017 %E A288721 a(6)-a(15) from _Andrew Howroyd_, Sep 04 2017