A223821 Number of nX4 0..3 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope.

22, 22, 484, 744, 25080, 45000, 2551604, 4923882, 362643556, 760921872, 67380659016, 143668888998, 14708225919640, 31720212766700, 3619610990119432

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Column 4 of A223824

Examples

			Some solutions for n=4
..0..3..0..1....0..3..3..0....2..0..0..2....0..3..0..1....3..3..3..3
..1..1..1..1....3..0..0..3....3..3..3..3....1..3..3..1....2..0..0..2
..1..1..1..1....3..0..0..3....3..0..0..3....1..3..3..1....2..3..3..2
..0..3..0..1....0..3..3..0....2..1..1..2....0..3..0..1....3..2..2..3