A202555 Number of nX3 0,1 arrays with the row and column sums nondecreasing.

4, 17, 66, 235, 824, 2848, 9520, 31648, 104536, 339553, 1099666, 3549038, 11338836, 36160324, 115069316, 363700188, 1148126044, 3619072821, 11352513438, 35579368776, 111388887136, 347450537496, 1083054672896, 3373317547471

Offset: 1

Author

R. H. Hardin Dec 21 2011

Keywords

• nonn

Comments

Column 3 of A202560

Examples

			Some solutions for n=8
..0..1..0....0..1..0....1..0..0....0..0..0....0..0..0....0..1..1....1..0..0
..0..0..1....0..1..0....0..0..1....0..0..1....0..0..1....1..0..1....1..1..0
..0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....1..1..0....1..0..1
..0..1..0....0..0..1....0..0..1....1..0..0....0..1..0....1..0..1....1..1..0
..0..1..0....1..0..1....0..1..1....0..1..0....0..1..0....0..1..1....0..1..1
..0..0..1....1..0..1....1..1..0....0..1..1....1..0..0....0..1..1....0..1..1
..1..0..0....0..1..1....1..0..1....0..1..1....0..0..1....0..1..1....1..0..1
..0..1..1....1..1..0....0..1..1....1..1..1....0..1..1....1..0..1....0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..117