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%I #4 Sep 13 2012 05:32:14
%S 1,4,25,279,4800,116635,3760019,153831836,7730921915,465562795125,
%T 32949873078160,2698248029796465,252407175864930849,
%U 26685021081300144340
%N Number of horizontal, vertical or knight-move neighbor colorings of an nX2 array with new integer colors introduced in row major order
%C Column 2 of A216663
%e Some solutions for n=3
%e ..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
%e ..2..3....2..3....2..0....1..2....1..0....2..0....2..3....2..0....2..3....2..3
%e ..0..2....4..1....0..2....0..3....2..3....0..1....3..1....3..1....0..4....3..4
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 13 2012