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Number of 3Xn 0..n arrays with every repeated value in every row equal to, and in every column unequal to, the previous repeated value, and new values introduced in row-major sequential order.
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%I #3 Jan 28 2016 07:36:00

%S 3,96,9054,1589578,479973420,225814538887,153953047945654,

%T 144125445548106706,177859506524316980568,280296331296968179117250

%N Number of 3Xn 0..n arrays with every repeated value in every row equal to, and in every column unequal to, the previous repeated value, and new values introduced in row-major sequential order.

%C Row 3 of A268180.

%e Some solutions for n=3

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

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

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

%Y Cf. A268180.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 28 2016