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 A266466 #4 Dec 29 2015 19:54:23 %S A266466 2,6,19,66,232,794,2574,7797,22058,58469,146027,345578,779240,1682359, %T A266466 3492869,6999952,13585959,25610002,47004982,84187248,147421139, %U A266466 252829908,425319569,702767285,1141951244,1826839569,2880058656,4478585700 %N A266466 Number of nX4 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing. %C A266466 Column 4 of A266470. %H A266466 R. H. Hardin, <a href="/A266466/b266466.txt">Table of n, a(n) for n = 1..67</a> %e A266466 Some solutions for n=4 %e A266466 ..0..1..1..1....0..0..0..1....0..0..0..0....0..0..1..1....0..1..1..1 %e A266466 ..1..0..0..1....0..0..0..1....0..1..1..1....0..1..0..0....0..1..1..1 %e A266466 ..1..1..1..0....1..1..1..0....1..0..0..0....1..0..0..0....1..0..0..0 %e A266466 ..1..1..1..1....1..1..1..0....1..0..0..0....1..1..0..0....1..0..0..0 %Y A266466 Cf. A266470. %K A266466 nonn %O A266466 1,1 %A A266466 _R. H. Hardin_, Dec 29 2015