A266939 Number of 6Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

7, 29, 92, 288, 871, 2577, 7185, 19529, 50216, 125786, 298869, 696808, 1546941, 3382516, 7085876, 14650326, 29153966, 57417292, 109223923, 205966389, 376634957, 683318087, 1206075185, 2114385852, 3615867548

Offset: 1

Author

R. H. Hardin, Jan 06 2016

Keywords

• nonn

Comments

Row 6 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..0..1
..0..0..0..1....0..0..1..0....0..1..0..1....0..0..1..0....0..0..1..1
..0..0..0..1....0..1..0..0....1..0..0..1....0..0..1..0....1..1..0..0
..1..1..1..0....1..0..0..0....1..0..1..0....0..1..0..0....1..1..0..0
..1..1..1..0....1..0..0..0....1..1..0..0....1..0..0..0....1..1..1..0
..1..1..1..0....1..1..1..1....1..1..1..0....1..1..0..1....1..1..1..0
		

Crossrefs

Cf. A266935.