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%I #4 Mar 14 2013 09:50:02
%S 0,306,7074,207216,4047876,97159620,1928081520,43509150044,
%T 873828163878,19208528576854,389079560250324,8428330075480050,
%U 171707154474046338,3686377068301662354,75409883058327101568,1609394321785721896586
%N Number of nX3 0..2 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
%C Column 3 of A223074
%H R. H. Hardin, <a href="/A223073/b223073.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for n=3
%e ..0..2..0....2..1..0....2..0..2....2..1..2....2..2..2....0..1..2....2..2..1
%e ..1..1..0....1..1..0....2..0..0....1..1..0....0..2..2....1..1..1....1..2..2
%e ..0..0..1....2..2..2....0..1..2....0..1..1....2..1..2....1..0..2....0..2..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 14 2013
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