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Number of nX2 0..1 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
2

%I #4 Mar 07 2013 11:00:50

%S 3,6,18,41,123,310,957,2530,7848,21618,67131,188835,585276,1670602,

%T 5161503,14880389,45808419,133004125,408229851,1191329175,3646802121,

%U 10684589006,32632896159,95903053435,292350907470,861289976308

%N Number of nX2 0..1 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 A222862

%H R. H. Hardin, <a href="/A222856/b222856.txt">Table of n, a(n) for n = 1..63</a>

%e Some solutions for n=3

%e ..1..1....0..0....0..0....0..0....0..0....0..0....0..1....1..1....0..1....0..1

%e ..0..0....0..0....1..1....0..0....0..0....0..1....0..1....0..1....0..0....0..0

%e ..1..1....1..1....0..1....0..1....0..0....0..0....1..1....1..1....0..1....1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 07 2013