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 A267733 #4 Jan 20 2016 07:06:14 %S A267733 51,2601,132651,4705642,163879101,4977655636,143643342651, %T A267733 3885150758271,100631663710208,2504347486850059,60346174969864276, %U A267733 1413700229500172653,32327674542336206829,723763598518295169155,15905358480144812745511 %N A267733 Number of nX6 0..1 arrays with every repeated value in every row and column greater than or equal to the previous repeated value. %C A267733 Column 6 of A267735. %H A267733 R. H. Hardin, <a href="/A267733/b267733.txt">Table of n, a(n) for n = 1..210</a> %e A267733 Some solutions for n=3 %e A267733 ..0..0..1..0..0..1....0..1..0..0..1..1....0..0..1..0..1..0....0..1..0..1..1..1 %e A267733 ..0..1..0..0..0..0....0..1..0..1..0..0....1..0..1..0..1..0....1..0..1..1..1..1 %e A267733 ..1..0..0..0..1..1....0..1..0..0..1..1....1..0..1..1..1..1....0..0..0..1..1..0 %Y A267733 Cf. A267735. %K A267733 nonn %O A267733 1,1 %A A267733 _R. H. Hardin_, Jan 20 2016