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 A284331 #6 Apr 05 2020 22:52:44 %S A284331 10,118,2259,68458,1792007,53977741,1544903012,46769835006, %T A284331 1390664014686,42363464831441,1283893093528916,39356428019998389, %U A284331 1205870610270117562,37167608852928420540,1146797011149724787289,35507304286797019507210 %N A284331 Number of n X 5 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. %C A284331 Column 5 of A284334. %H A284331 R. H. Hardin, <a href="/A284331/b284331.txt">Table of n, a(n) for n = 1..87</a> %e A284331 Some solutions for n=4 %e A284331 ..0..0..1..1..0. .0..1..0..0..1. .0..1..1..1..0. .0..1..1..1..1 %e A284331 ..1..0..0..1..1. .1..1..0..0..0. .0..1..0..0..0. .0..0..1..0..1 %e A284331 ..1..0..0..0..0. .0..0..1..1..1. .1..1..1..1..0. .1..1..0..0..1 %e A284331 ..1..1..1..0..0. .1..0..1..0..1. .0..0..1..0..1. .0..1..0..0..0 %Y A284331 Cf. A284334. %K A284331 nonn %O A284331 1,1 %A A284331 _R. H. Hardin_, Mar 25 2017