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 A293106 #6 Apr 06 2020 00:09:23 %S A293106 0,2088,202363,25504769,2804027631,331401441383,38469698642410, %T A293106 4639160801369811,553541878970691305,67495383900522580833, %U A293106 8184590699346266638663,1005200402879395725773000 %N A293106 Number of 7 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1. %C A293106 Row 7 of A293100. %H A293106 R. H. Hardin, <a href="/A293106/b293106.txt">Table of n, a(n) for n = 1..14</a> %e A293106 Some solutions for n=2 %e A293106 ..0..0. .0..1. .0..0. .0..1. .0..0. .0..0. .0..1. .0..0. .0..1. .0..1 %e A293106 ..1..0. .0..1. .1..0. .0..0. .0..1. .0..0. .0..0. .1..1. .0..0. .1..0 %e A293106 ..0..1. .0..1. .1..0. .0..0. .0..1. .1..0. .1..0. .1..0. .1..0. .1..0 %e A293106 ..1..0. .1..0. .0..0. .1..1. .0..0. .1..1. .1..0. .1..0. .1..0. .0..0 %e A293106 ..0..1. .0..0. .0..0. .0..1. .1..0. .1..0. .1..0. .1..0. .1..1. .1..1 %e A293106 ..1..0. .0..0. .1..1. .1..0. .1..1. .0..0. .1..0. .0..0. .0..0. .0..0 %e A293106 ..0..0. .1..0. .1..0. .0..0. .1..0. .0..1. .0..1. .0..1. .0..1. .0..1 %Y A293106 Cf. A293100. %K A293106 nonn %O A293106 1,2 %A A293106 _R. H. Hardin_, Sep 30 2017