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Number of nX1 0..3 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 #5 Mar 27 2013 11:52:20

%S 4,4,16,22,112,172,1064,1742,11664,19976,138640,243802,1732272,

%T 3104312,22419608,40745940,297918608,547354320,4040882352,7488584886,

%U 55716851136,103984450924,778639744064,1461701983398,11004152490272,20759785009832

%N Number of nX1 0..3 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 1 of A223824

%H R. H. Hardin, <a href="/A223819/b223819.txt">Table of n, a(n) for n = 1..199</a>

%e Some solutions for n=4

%e ..0....0....2....3....3....2....1....2....1....3....2....1....1....2....3....0

%e ..0....3....2....1....0....0....0....1....2....3....3....0....1....0....2....3

%e ..0....0....2....1....3....0....0....1....2....3....3....3....1....3....2....3

%e ..0....1....2....3....2....2....1....2....1....3....2....0....1....1....3....0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 27 2013