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%I #7 Jun 07 2021 13:53:52
%S 10,50,500,3886,40380,359428,3723640,34904103,359369380,3443215781,
%T 35239493220,341632309893,3481114925880,33990585784253,
%U 345233367469580,3387095713649185,34318646356187030,337838214180679732
%N Number of n X 2 0..3 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 2 of A223165.
%H R. H. Hardin, <a href="/A223161/b223161.txt">Table of n, a(n) for n = 1..31</a>
%e Some solutions for n=3
%e ..0..0....1..1....0..0....2..3....0..1....2..2....0..0....1..1....1..1....0..1
%e ..2..3....2..3....0..3....0..0....0..3....0..3....0..1....3..3....2..2....0..1
%e ..2..3....1..2....0..1....3..3....0..2....2..3....0..2....3..3....2..2....0..1
%Y Cf. A223165.
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 16 2013
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