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

1,2

Comments

Column 4 of A222953

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A204874 A234858 A234856 * A204967 A011771 A011770

Adjacent sequences: A222949 A222950 A222951 * A222953 A222954 A222955

Keyword

nonn

Author

R. H. Hardin Mar 10 2013

Status

approved