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A155384
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 3,1 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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%I #3 Mar 31 2012 12:35:23
%S 1,7,19,64,310,1325,5981,32023,203050,1519404,13409104,137343202
%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 3,1 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........0.1
%e ..........0.1.0
%e .........1.1.0.1
%e ........1.1.0.0.1
%e .......1.0.0.0.0.1
%e ......1.0.0.0.0.1.1
%e .....0.0.0.0.0.0.1.0
%e ....1.1.1.1.0.0.0.1.0
%e ...0.0.0.1.1.1.1.0.1.0
%K nonn
%O 6,2
%A _R. H. Hardin_ Jan 22 2009
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