A188451 Number of (3*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 3 ones in every column.

0, 0, 5, 139, 4944, 244490, 15980350, 1330789145, 137418347276, 17218246261956

Offset: 1

Author

R. H. Hardin Mar 31 2011

Keywords

• nonn

Comments

Row 3 of A188449

Examples

			All solutions for 9X3
..1..1..1....1..1..1....1..1..0....1..1..1....1..1..1
..1..0..1....1..1..0....1..0..1....1..1..0....1..1..0
..1..0..0....1..0..1....1..0..0....1..0..0....1..0..1
..0..1..1....0..1..0....0..1..1....0..1..1....0..1..1
..0..1..0....0..0..1....0..1..0....0..0..1....0..0..0
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0