A222952 Number of nX4 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.

0, 36302, 8579208, 3084748094, 690124074740, 194406198823968, 44586928533264392

Offset: 1

Author

R. H. Hardin Mar 10 2013

Keywords

• nonn

Comments

Column 4 of A222953

Examples

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