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Number of n X n 0..2 arrays with no more than floor(n X n/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
0

%I #5 Dec 18 2015 18:18:29

%S 1,10,1154,1780641,12483535858,1092037282618789,408653905036011361072,

%T 1924878822883438537017070318,37532720906358968019501781345379199

%N Number of n X n 0..2 arrays with no more than floor(n X n/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Diagonal of A223126

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 15 2013