A202558 Number of nX6 0,1 arrays with the row and column sums nondecreasing.

7, 151, 2848, 57255, 1126437, 22360610, 436020774, 8531393529, 165372103634, 3209822188135, 61997477071836, 1199480307020988, 23143113343639189, 447443373807337136, 8639247851127637315

Offset: 1

Author

R. H. Hardin Dec 21 2011

Keywords

• nonn

Comments

Column 6 of A202560

Examples

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