A188452 Number of (4*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 4 ones in every column.

0, 0, 1, 139, 16683, 2876300, 703845255, 235994839738, 105035943170557

Offset: 1

Author

R. H. Hardin Mar 31 2011

Keywords

• nonn

Comments

Row 4 of A188449

Examples

			All solutions for 12X3
..1..1..1
..1..1..0
..1..0..1
..1..0..0
..0..1..1
..0..1..0
..0..0..1
..0..0..0
..0..0..0
..0..0..0
..0..0..0
..0..0..0