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 A293092 #6 Apr 05 2020 23:44:02 %S A293092 0,304,31689,1955375,114271723,6736259130,400400301913,24022615231872, %T A293092 1451795434173743,88257377665716728,5391112388504592871, %U A293092 330623156140657023518,20344354254754073053900,1255446507295181179756805 %N A293092 Number of 6 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1. %C A293092 Row 6 of A293087. %H A293092 R. H. Hardin, <a href="/A293092/b293092.txt">Table of n, a(n) for n = 1..41</a> %e A293092 Some solutions for n=3 %e A293092 ..1..0..0. .0..1..1. .0..0..1. .0..0..1. .0..1..0. .1..1..0. .0..1..1 %e A293092 ..1..1..0. .1..0..0. .1..1..0. .0..1..0. .0..0..0. .1..1..0. .0..0..0 %e A293092 ..0..0..0. .0..1..1. .1..1..0. .1..0..1. .0..0..0. .0..0..1. .0..1..1 %e A293092 ..0..1..0. .1..1..0. .0..0..0. .0..1..0. .1..0..1. .0..0..0. .0..0..1 %e A293092 ..1..1..1. .0..0..0. .0..1..1. .0..0..1. .1..0..1. .1..1..1. .0..1..0 %e A293092 ..0..0..1. .1..0..0. .0..0..0. .0..1..1. .0..0..0. .0..0..0. .1..1..1 %Y A293092 Cf. A293087. %K A293092 nonn %O A293092 1,2 %A A293092 _R. H. Hardin_, Sep 30 2017