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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 4,3 5,4 5,5 polyhexes in any orientation on a planar nXnXn triangular grid.
0

%I #3 Mar 31 2012 12:35:23

%S 1,4,10,22,55,192,618,2255,11708,67218,421461,2956054,24412206,

%T 225564175

%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 4,3 5,4 5,5 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 10 X 10 X 10 example

%e ............1

%e ...........1.0

%e ..........0.1.0

%e .........0.1.0.0

%e ........1.0.1.1.0

%e .......0.1.0.0.1.1

%e ......0.1.0.0.0.0.0

%e .....0.0.1.0.0.1.1.0

%e ....0.1.1.0.1.1.0.1.1

%e ...1.1.0.0.1.0.0.0.0.1

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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