A266467 Number of nX5 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

2, 7, 28, 137, 735, 4074, 22128, 113677, 544142, 2417707, 9991874, 38585111, 139969744, 479482160, 1558677189, 4829461991, 14318767180, 40765225229, 111787710303, 296081929163, 759290568963, 1889449601320, 4571408444209

Offset: 1

Author

R. H. Hardin, Dec 29 2015

Keywords

• nonn

Comments

Column 5 of A266470.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..32

Crossrefs

Cf. A266470.