login
Number of nX3 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope
2

%I #4 Mar 10 2013 10:28:30

%S 4,4,16,16,64,64,400,324,2704,2304,23104,19044,222784,183184,2310400,

%T 1937664,25441936,21641104,292820544,252301456,3481944064,3038655376,

%U 42543187600,37528988176,531580977216,473355008064,6768530689600

%N Number of nX3 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope

%C Column 3 of A222959

%H R. H. Hardin, <a href="/A222956/b222956.txt">Table of n, a(n) for n = 1..75</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 10 2013