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 A284197 #6 Apr 05 2020 22:40:02 %S A284197 19,455,18842,1001047,54333131,3083244672,178138187113,10468760423253, %T A284197 622301968698475,37339790561577376,2256975037851499153, %U A284197 137242646380023688189,8386798450042067878075,514631022193968182602408 %N A284197 Number of n X 6 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. %C A284197 Column 6 of A284199. %H A284197 R. H. Hardin, <a href="/A284197/b284197.txt">Table of n, a(n) for n = 1..53</a> %e A284197 Some solutions for n=3 %e A284197 ..0..1..0..1..1..0. .0..0..0..1..1..0. .0..1..1..0..0..1. .0..1..0..1..0..0 %e A284197 ..0..1..1..1..0..0. .0..1..1..0..0..1. .1..1..0..0..0..0. .0..1..1..1..1..1 %e A284197 ..0..1..0..1..0..0. .0..1..1..0..1..1. .1..0..1..0..1..1. .0..0..0..1..0..1 %Y A284197 Cf. A284199. %K A284197 nonn %O A284197 1,1 %A A284197 _R. H. Hardin_, Mar 22 2017