A222843 Number of (n+1) X 2 0..2 arrays with every row and column least squares fitting to a positive slope straight line.

1, 3, 16, 48, 185, 534, 1873, 5397, 17853, 51516, 165882, 480321, 1519997, 4419336, 13827716, 40372992, 125335640, 367166796, 1133563870, 3330422526, 10238553681, 30154137624, 92399944682, 272682432123, 833404227103, 2463640724667

Offset: 1

Author

R. H. Hardin, Mar 07 2013

Keywords

• nonn

Examples

			Some solutions for n=3:
..0..2....0..1....0..1....0..1....0..2....0..1....0..1....0..1....0..1....0..2
..0..1....0..2....1..2....0..2....0..1....0..1....1..2....0..1....0..1....0..1
..1..2....0..1....0..1....1..2....0..2....0..1....0..2....1..2....0..2....1..2
..1..2....1..2....1..2....0..2....1..2....1..2....1..2....0..2....1..2....0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..46

Crossrefs

Column 1 of A222847.