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Number of n X n 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors
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%I #6 Dec 18 2015 18:17:32

%S 1,9,101,3507,371691,89738569

%N Number of n X n 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors

%C Diagonal of A183526

%e Some solutions for 3X3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 05 2011