A188410 Number of (n^2)Xn binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

1, 3, 39, 3217, 2181522, 14100262412, 990154499577167

Offset: 1

Author

R. H. Hardin Mar 30 2011

Keywords

• nonn

Comments

Diagonal of A188416

Examples

			All solutions for 4X2
..1..1....1..1....1..0
..1..0....1..1....1..0
..0..1....0..0....0..1
..0..0....0..0....0..1