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 A284196 #6 Apr 05 2020 22:39:21 %S A284196 10,131,1919,71181,1488503,54333131,1321614728,45952259333, %T A284196 1219757876905,40859784312028,1146325236883584,37457479952593565, %U A284196 1089802904379131200,35049513938138368608,1044879421569977298080,33275440972162414040143 %N A284196 Number of n X 5 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 A284196 Column 5 of A284199. %H A284196 R. H. Hardin, <a href="/A284196/b284196.txt">Table of n, a(n) for n = 1..99</a> %e A284196 Some solutions for n=4 %e A284196 ..0..0..0..1..1. .0..1..1..1..1. .0..0..1..1..0. .0..0..0..0..0 %e A284196 ..1..0..1..1..1. .1..0..1..0..0. .1..0..0..1..1. .0..0..1..1..0 %e A284196 ..1..0..0..1..1. .1..1..0..0..1. .1..0..1..1..0. .0..1..1..1..0 %e A284196 ..1..1..0..0..0. .0..0..1..0..0. .0..1..0..1..0. .1..1..1..1..1 %Y A284196 Cf. A284199. %K A284196 nonn %O A284196 1,1 %A A284196 _R. H. Hardin_, Mar 22 2017