A188389 Number of (5*n) X 5 binary arrays with rows in nonincreasing order and n ones in every column.

52, 1750, 35775, 507549, 5442547, 46757209, 335279744, 2067951459, 11224133015, 54571222450, 241058398756, 978630346891, 3686088206746, 12983700750813, 43054563334197, 135177521790982, 403818954811225, 1152699706324158

Offset: 1

Author

R. H. Hardin, Mar 30 2011

Keywords

• nonn

Examples

			Some solutions for 10 X 5:
..1..0..0..0..1....1..1..0..1..0....1..1..1..1..1....1..1..0..0..0
..1..0..0..0..0....1..0..0..1..0....1..0..1..0..0....1..1..0..0..0
..0..1..0..1..1....0..1..0..0..0....0..1..0..0..0....0..0..1..1..1
..0..1..0..0..0....0..0..1..0..0....0..0..0..1..0....0..0..1..1..0
..0..0..1..0..0....0..0..1..0..0....0..0..0..0..1....0..0..0..0..1
..0..0..1..0..0....0..0..0..0..1....0..0..0..0..0....0..0..0..0..0
..0..0..0..1..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..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..19

Crossrefs

Column 5 of A188392.