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Number of 6Xn 0..2 arrays with exactly floor(6Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
0

%I #3 Mar 14 2013 17:17:45

%S 0,16352,6939648,2870336499,1153663937586,460895553576913,

%T 184306007437994168,73918403027984409534,29745203793179733648468,

%U 12008412523648988394871332

%N Number of 6Xn 0..2 arrays with exactly floor(6Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Row 6 of A223104

%e Some solutions for n=3

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 14 2013