A266425 Number of nX5 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

6, 41, 259, 1556, 8764, 45907, 223075, 1005991, 4224203, 16588684, 61226525, 213418690, 705807396, 2223963956, 6702140026, 19383434369, 53965133477, 145029252226, 377163396856, 951257706522, 2331468492530, 5562985385965

Offset: 1

Author

R. H. Hardin, Dec 29 2015

Keywords

• nonn

Comments

Column 5 of A266428.

Examples

			Some solutions for n=4
..0..0..0..1..1....0..0..1..1..1....0..0..1..1..1....0..0..0..1..1
..0..1..1..1..1....0..1..0..0..1....0..0..1..1..1....0..0..1..0..1
..1..0..1..0..0....1..0..0..0..0....0..1..0..0..1....0..0..1..1..1
..1..1..0..0..0....1..1..1..1..1....1..0..0..0..1....0..1..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..31

Crossrefs

Cf. A266428.