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Number of nX3 0..1 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
1

%I #4 Mar 22 2013 20:07:37

%S 8,10,32,44,192,296,1744,2838,18736,32016,221344,388830,2758976,

%T 4941116,35662528,64786608,473507728,869683644,6418667904,11892172228,

%U 88460803136,165061529924,1235762441328,2319452057140,17458917553440

%N Number of nX3 0..1 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 3 of A223592

%H R. H. Hardin, <a href="/A223587/b223587.txt">Table of n, a(n) for n = 1..73</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 22 2013