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

1,1

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

Links

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

Example

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

Crossrefs

Sequence in context: A287633 A222931 A258645 * A101193 A258646 A258647

Adjacent sequences: A222950 A222951 A222952 * A222954 A222955 A222956

Keyword

nonn,tabl

Author

R. H. Hardin Mar 10 2013

Status

approved