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 A267963 #4 Jan 22 2016 14:29:11 %S A267963 63,3969,157182,5843562,185900905,5520230601,151596664089, %T A267963 3948855568663,97889332200024,2332332672746881,53631396879772976, %U A267963 1196249503631460096,25965520951599991001,550166212967293315266,11406213718800127365141 %N A267963 Number of nX4 0..2 arrays with every repeated value in every row and column greater than the previous repeated value. %C A267963 Column 4 of A267966. %H A267963 R. H. Hardin, <a href="/A267963/b267963.txt">Table of n, a(n) for n = 1..186</a> %e A267963 Some solutions for n=3 %e A267963 ..2..0..2..1....0..0..2..0....2..0..2..0....2..0..1..2....0..1..0..1 %e A267963 ..2..2..1..0....0..0..1..2....0..2..1..2....1..1..2..1....0..2..2..1 %e A267963 ..1..2..0..1....1..2..0..1....2..0..2..0....0..0..1..2....2..2..1..0 %Y A267963 Cf. A267966. %K A267963 nonn %O A267963 1,1 %A A267963 _R. H. Hardin_, Jan 22 2016