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 A266546 #3 Dec 31 2015 07:06:40 %S A266546 2,5,13,36,110,366,1688,5312,24921,101495,417118,1673507,6081357, %T A266546 22843019,72935735,238112928,734665224,2185350505 %N A266546 Number of nX7 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing. %C A266546 Column 7 of A266547. %e A266546 Some solutions for n=6 %e A266546 ..0..0..0..0..1..1..1....0..0..0..1..1..1..1....0..0..0..0..1..1..1 %e A266546 ..0..1..1..1..0..0..0....0..0..1..0..0..1..1....0..0..0..1..0..1..1 %e A266546 ..1..0..0..1..0..0..0....0..1..0..1..1..0..0....0..0..1..0..1..0..0 %e A266546 ..1..0..1..0..0..0..0....1..0..1..0..0..0..0....0..0..1..1..0..0..0 %e A266546 ..1..1..0..0..0..0..0....1..1..0..0..0..0..0....1..1..0..0..0..0..0 %e A266546 ..1..1..0..0..0..0..0....1..1..0..0..0..0..0....1..1..0..0..0..0..0 %Y A266546 Cf. A266547. %K A266546 nonn %O A266546 1,1 %A A266546 _R. H. Hardin_, Dec 31 2015