A188411 Number of (4*n)X4 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

14, 124, 723, 3217, 11712, 36659, 101829, 256901, 598561, 1304537, 2685847, 5264872, 9887953, 17884567, 31286432, 53124506, 87823301, 141718060, 223721900, 346177936, 525932968, 785679308, 1155612796, 1675467445, 2396988410

Offset: 1

Author

R. H. Hardin Mar 30 2011

Keywords

• nonn

Comments

Column 4 of A188416

Examples

			Some solutions for 8X4
..1..1..0..1....1..0..0..1....1..0..0..1....1..1..1..0....1..0..1..0
..1..0..1..0....1..0..0..0....1..0..0..1....1..1..0..0....1..0..0..0
..0..1..1..1....0..1..0..0....0..1..1..0....0..0..1..0....0..1..1..1
..0..0..0..0....0..1..0..0....0..1..0..0....0..0..0..1....0..1..0..1
..0..0..0..0....0..0..1..1....0..0..1..0....0..0..0..1....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..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..49