A223064 Number of nX4 0..3 arrays with every row having the same least squares slope fit to a straight line, and every column the same least squares slope fit to a straight line, with a single point array taken as having zero slope

256, 452, 6794, 19300, 480598, 1776550, 60959690, 244824466, 10179315678, 43975762290, 2130524532690, 9437282849494, 517417251582226

Offset

1,1

Comments

Column 4 of A223066

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A299156 A221259 A223693 * A206206 A206199 A271811

Adjacent sequences: A223061 A223062 A223063 * A223065 A223066 A223067

Keyword

nonn

Author

R. H. Hardin Mar 13 2013

Status

approved