A266929 Number of n X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

2, 4, 9, 35, 210, 2577, 68890, 4605960, 821453747

Offset: 1

Author

R. H. Hardin, Jan 06 2016

Keywords

• nonn

Comments

Diagonal of A266935.

Examples

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

Crossrefs

Cf. A266935.