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Number of n X n 0..3 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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%I #5 Dec 18 2015 18:18:27

%S 1,3,34,5896,1615706,8113737592,39461160617203,3271351045573714833,

%T 264112864034567015904268

%N Number of n X n 0..3 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Diagonal of A222794

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 05 2013