A222856 Number of nX2 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.

3, 6, 18, 41, 123, 310, 957, 2530, 7848, 21618, 67131, 188835, 585276, 1670602, 5161503, 14880389, 45808419, 133004125, 408229851, 1191329175, 3646802121, 10684589006, 32632896159, 95903053435, 292350907470, 861289976308

Offset: 1

Author

R. H. Hardin Mar 07 2013

Keywords

• nonn

Comments

Column 2 of A222862

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..63