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 A303049 #13 Feb 16 2025 08:33:53 %S A303049 4,32,370,10102,547888,57177700,11840492228,4851988794700, %T A303049 3925043687686610,6272313979455281150,19802247395866119585902, %U A303049 123501868366552999691029394,1521619453753652011100192319196,37035171896737433898000971545353724,1780729821252117006470518879967287810584 %N A303049 Number of total dominating sets in the n-triangular grid graph. %H A303049 Andrew Howroyd, <a href="/A303049/b303049.txt">Table of n, a(n) for n = 1..19</a> %H A303049 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TotalDominatingSet.html">Total Dominating Set</a> %H A303049 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TriangularGridGraph.html">Triangular Grid Graph</a> %Y A303049 Cf. A287064, A288721, A302486. %K A303049 nonn %O A303049 1,1 %A A303049 _Eric W. Weisstein_, Apr 17 2018 %E A303049 Terms a(6) and beyond from _Andrew Howroyd_, Apr 17 2018