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Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j)
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%I #5 Dec 18 2015 18:18:43

%S 0,27,3787,4722977,49754476927,4381081731832923,3274958849115023706081

%N Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j)

%C Diagonal of A230176

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 11 2013