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%I #4 Mar 12 2013 18:49:18
%S 18,120,2160,24120,476298,6701732,129263994,2034174870,38872156608,
%T 638334265140,12063810334392,203277623324301,3807709928026200,
%U 65141220918760312,1212020863903182816,20946272883788339613
%N Number of nX3 0..2 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope
%C Column 3 of A223048
%H R. H. Hardin, <a href="/A223046/b223046.txt">Table of n, a(n) for n = 1..17</a>
%e Some solutions for n=3
%e ..0..1..1....0..0..1....0..0..1....0..2..1....0..1..0....1..1..2....0..0..0
%e ..0..0..0....2..1..2....2..2..2....0..1..0....0..0..0....0..1..2....1..2..1
%e ..0..2..2....1..2..2....1..2..2....1..2..2....1..2..1....1..1..2....2..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 12 2013