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Number of nX3 0..2 arrays with row sums equal and column sums equal
1

%I #5 Mar 31 2012 12:36:57

%S 3,9,87,177,993,10833,35619,219873,2083713,8710539,55644339,473819481,

%T 2320792659,15120204297,119105713827,650725327233,4293779332929,

%U 32065818855387,188739799967427,1256510215733187,9061494550445907

%N Number of nX3 0..2 arrays with row sums equal and column sums equal

%C Column 3 of A203564

%H R. H. Hardin, <a href="/A203559/b203559.txt">Table of n, a(n) for n = 1..122</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 03 2012