A266541 Number of n X n binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing.

2, 3, 5, 12, 36, 176, 1688, 48167, 4283651

Offset: 1

Author

R. H. Hardin, Dec 31 2015

Keywords

• nonn

Comments

Diagonal of A266547.

Examples

			Some solutions for n=6
..0..0..0..0..1..1....0..0..1..1..1..1....0..1..1..1..1..1....0..1..1..1..1..1
..0..0..1..1..0..0....0..1..0..0..1..1....1..0..0..1..1..1....1..0..0..1..1..1
..0..1..0..0..0..0....0..1..0..0..1..1....1..0..1..0..0..1....1..0..1..0..1..1
..1..0..0..0..0..0....1..0..1..1..0..0....1..1..0..0..1..0....1..1..0..1..0..0
..1..0..0..0..0..0....1..0..1..1..0..0....1..1..0..1..0..0....1..1..1..0..0..0
..1..0..0..0..0..0....1..1..0..0..0..0....1..1..1..0..0..0....1..1..1..0..0..0
		

Crossrefs

Cf. A266547.