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 A266939 #3 Jan 06 2016 11:34:40 %S A266939 7,29,92,288,871,2577,7185,19529,50216,125786,298869,696808,1546941, %T A266939 3382516,7085876,14650326,29153966,57417292,109223923,205966389, %U A266939 376634957,683318087,1206075185,2114385852,3615867548 %N A266939 Number of 6Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. %C A266939 Row 6 of A266935. %e A266939 Some solutions for n=4 %e A266939 ..0..0..0..1....0..0..0..1....0..0..1..1....0..0..0..1....0..0..0..1 %e A266939 ..0..0..0..1....0..0..1..0....0..1..0..1....0..0..1..0....0..0..1..1 %e A266939 ..0..0..0..1....0..1..0..0....1..0..0..1....0..0..1..0....1..1..0..0 %e A266939 ..1..1..1..0....1..0..0..0....1..0..1..0....0..1..0..0....1..1..0..0 %e A266939 ..1..1..1..0....1..0..0..0....1..1..0..0....1..0..0..0....1..1..1..0 %e A266939 ..1..1..1..0....1..1..1..1....1..1..1..0....1..1..0..1....1..1..1..0 %Y A266939 Cf. A266935. %K A266939 nonn %O A266939 1,1 %A A266939 _R. H. Hardin_, Jan 06 2016