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Number of 1Xn 0..n arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.
3

%I #4 Jan 24 2016 09:27:53

%S 1,2,4,12,40,154,656,3074,15616,85360,498464,3092450,20286360,

%T 140153382,1016262080,7710988372,61062381784,503482376930,

%U 4313580705728,38328590370762,352618807559008,3353663977088848,32927374589861296

%N Number of 1Xn 0..n arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

%C Row 1 of A268009.

%H R. H. Hardin, <a href="/A268010/b268010.txt">Table of n, a(n) for n = 1..122</a>

%e Some solutions for n=8

%e ..0..1..0..1..0..2..0..0....0..1..1..2..3..4..2..1....0..1..2..3..0..2..4..3

%Y Cf. A268009.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 24 2016