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 A266467 #4 Dec 29 2015 19:55:06 %S A266467 2,7,28,137,735,4074,22128,113677,544142,2417707,9991874,38585111, %T A266467 139969744,479482160,1558677189,4829461991,14318767180,40765225229, %U A266467 111787710303,296081929163,759290568963,1889449601320,4571408444209 %N A266467 Number of nX5 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing. %C A266467 Column 5 of A266470. %H A266467 R. H. Hardin, <a href="/A266467/b266467.txt">Table of n, a(n) for n = 1..32</a> %e A266467 Some solutions for n=4 %e A266467 ..0..0..0..0..0....0..0..0..1..1....0..0..0..0..0....0..1..1..1..1 %e A266467 ..0..0..0..0..1....0..1..1..0..0....0..0..1..1..1....1..0..0..0..0 %e A266467 ..0..0..1..1..0....1..0..0..0..0....1..1..0..0..0....1..0..1..1..1 %e A266467 ..1..1..0..0..0....1..0..0..0..0....1..1..1..1..1....1..1..0..0..0 %Y A266467 Cf. A266470. %K A266467 nonn %O A266467 1,1 %A A266467 _R. H. Hardin_, Dec 29 2015