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Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2
0

%I #3 Jan 06 2013 19:58:05

%S 0,1024,1560,44903401,4684821704,4919350997521,1286684357154700,

%T 711683286892712289,249788326721013262468,113635514869793774013025,

%U 44202928096066452637659216

%N Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2

%C Row 6 of A221255

%e Some solutions for n=3

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 06 2013