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Number of nX3 0..2 arrays with row sums equal and column sums unequal to adjacent columns
1

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

%S 12,80,624,3760,25002,171068,1107888,7411872,50469114,335270710,

%T 2266967088,15497479060,104719636176,715192200880,4919017621164,

%U 33647413101184,231673960276602,1602349695229334,11054192845643568

%N Number of nX3 0..2 arrays with row sums equal and column sums unequal to adjacent columns

%C Column 3 of A203491

%H R. H. Hardin, <a href="/A203486/b203486.txt">Table of n, a(n) for n = 1..106</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 02 2012