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 A291873 #7 Feb 16 2025 08:33:51 %S A291873 1,3,3,4,15,4,4,48,48,4,4,144,336,144,4,4,432,2192,2192,432,4,4,1296, %T A291873 14544,29648,14544,1296,4,4,3888,96528,405648,405648,96528,3888,4,4, %U A291873 11664,640336,5568336,11293568,5568336,640336,11664,4 %N A291873 Array read by antidiagonals: T(m,n) = number of connected dominating sets in the m X n king graph. %H A291873 Andrew Howroyd, <a href="/A291873/b291873.txt">Table of n, a(n) for n = 1..435</a> %H A291873 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConnectedDominatingSet.html">Connected Dominating Set</a> %H A291873 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KingGraph.html">King Graph</a> %e A291873 Array begins: %e A291873 ====================================================================== %e A291873 m\n| 1 2 3 4 5 6 7 %e A291873 ---|------------------------------------------------------------------ %e A291873 1 | 1 3 4 4 4 4 4... %e A291873 2 | 3 15 48 144 432 1296 3888... %e A291873 3 | 4 48 336 2192 14544 96528 640336... %e A291873 4 | 4 144 2192 29648 405648 5568336 76414224... %e A291873 5 | 4 432 14544 405648 11293568 315156544 8793207424... %e A291873 6 | 4 1296 96528 5568336 315156544 17784998912 1001953789632... %e A291873 7 | 4 3888 640336 76414224 8793207424 1001953789632 113637188081536... %e A291873 ... %Y A291873 Row 2 is A188825(n) for n > 2. %Y A291873 Main diagonal is A289180. %Y A291873 Cf. A218663, A291872. %K A291873 nonn,tabl %O A291873 1,2 %A A291873 _Andrew Howroyd_, Sep 04 2017