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A155448
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Number of ways to place zero or more nonadjacent 2,0 3,1 4,2 4,3 4,4 5,2 6,2 7,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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%I
%S 1,7,19,37,61,198,925,4932,25307,120759,705438,5070257,44891211,
%T 447175598,4812407060,57607358493
%N Number of ways to place zero or more nonadjacent 2,0 3,1 4,2 4,3 4,4 5,2 6,2 7,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 12 X 12 X 12 example
%e ..............0
%e .............0.0
%e ............0.0.1
%e ...........0.0.1.0
%e ..........1.1.1.0.0
%e .........0.0.0.1.0.0
%e ........0.0.1.0.1.0.0
%e .......0.0.1.0.0.1.0.1
%e ......0.0.1.0.0.0.0.1.0
%e .....1.1.1.0.1.1.1.1.0.0
%e ....0.0.0.1.0.0.0.0.1.0.0
%e ...0.0.0.0.1.0.0.0.0.1.0.0
%K nonn
%O 7,2
%A _R. H. Hardin_ Jan 22 2009
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