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 A268016 #4 Jan 24 2016 09:55:25 %S A268016 78,6084,474552,31831908,2012075697,119453097281,6761580343329, %T A268016 367501986337710,19300005472710895,983989084426524929, %U A268016 48888960624425750151,2374418848334124952354,113014440791056538695922 %N A268016 Number of nX4 0..2 arrays with every repeated value in every row and column greater than or equal to the previous repeated value. %C A268016 Column 4 of A268019. %H A268016 R. H. Hardin, <a href="/A268016/b268016.txt">Table of n, a(n) for n = 1..210</a> %e A268016 Some solutions for n=2 %e A268016 ..2..1..0..0....2..1..2..1....0..2..2..2....2..1..1..1....0..2..1..1 %e A268016 ..2..1..0..2....0..1..0..2....1..0..2..1....2..0..2..2....2..0..1..1 %Y A268016 Cf. A268019. %K A268016 nonn %O A268016 1,1 %A A268016 _R. H. Hardin_, Jan 24 2016