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%I #3 Mar 13 2013 13:55:57
%S 256,452,6794,19300,480598,1776550,60959690,244824466,10179315678,
%T 43975762290,2130524532690,9437282849494,517417251582226
%N 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
%C Column 4 of A223066
%e Some solutions for n=3
%e ..1..0..2..0....2..0..0..1....0..3..1..1....0..0..0..1....3..0..1..2
%e ..3..0..2..2....3..3..3..2....0..1..2..0....0..3..3..1....1..1..2..0
%e ..1..0..2..0....3..1..1..2....0..3..1..1....0..0..0..1....3..0..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 13 2013