A222857 Number of nX3 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope.

6, 18, 108, 410, 2460, 11160, 70818, 346610, 2213136, 11587248, 73844100, 399763695, 2535415632, 14043080412, 88488807432, 497957337496, 3117629380302, 17742484266750, 110507820665700, 634061126810250, 3931544430607680

Offset: 1

Author

R. H. Hardin Mar 07 2013

Keywords

• nonn

Comments

Column 3 of A222862

Examples

			Some solutions for n=3
..0..0..1....1..1..1....1..0..1....0..0..0....0..1..0....0..0..1....0..1..0
..1..0..1....0..1..1....1..0..1....1..0..1....0..1..1....0..0..0....1..0..1
..0..1..1....1..1..1....1..1..1....0..0..0....0..1..0....1..0..1....0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..37