A222953 T(n,k)=Number of nXk 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.

4, 0, 0, 0, 212, 0, 0, 2256, 2256, 0, 0, 36302, 125664, 36302, 0, 0, 455904, 8579208, 8579208, 455904, 0, 0, 6471572, 436075392, 3084748094, 436075392, 6471572, 0, 0, 84040156, 25670781880, 690124074740, 690124074740, 25670781880, 84040156, 0, 0

Offset: 1

Author

R. H. Hardin Mar 10 2013

Keywords

• nonn
• tabl

Comments

Table starts

.4..........0.............0...............0...............0...............0

.0........212..........2256...........36302..........455904.........6471572

.0.......2256........125664.........8579208.......436075392.....25670781880

.0......36302.......8579208......3084748094....690124074740.194406198823968

.0.....455904.....436075392....690124074740.593420786763904

.0....6471572...25670781880.194406198823968

.0...84040156.1318401732192

.0.1156716696

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..49