# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a266425 Showing 1-1 of 1 %I A266425 #4 Dec 29 2015 09:52:39 %S A266425 6,41,259,1556,8764,45907,223075,1005991,4224203,16588684,61226525, %T A266425 213418690,705807396,2223963956,6702140026,19383434369,53965133477, %U A266425 145029252226,377163396856,951257706522,2331468492530,5562985385965 %N A266425 Number of nX5 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing. %C A266425 Column 5 of A266428. %H A266425 R. H. Hardin, Table of n, a(n) for n = 1..31 %e A266425 Some solutions for n=4 %e A266425 ..0..0..0..1..1....0..0..1..1..1....0..0..1..1..1....0..0..0..1..1 %e A266425 ..0..1..1..1..1....0..1..0..0..1....0..0..1..1..1....0..0..1..0..1 %e A266425 ..1..0..1..0..0....1..0..0..0..0....0..1..0..0..1....0..0..1..1..1 %e A266425 ..1..1..0..0..0....1..1..1..1..1....1..0..0..0..1....0..1..0..1..0 %Y A266425 Cf. A266428. %K A266425 nonn %O A266425 1,1 %A A266425 _R. H. Hardin_, Dec 29 2015 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE