A155365
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Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,1 4,1 5,0 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 1,7,19,37,176,778,2821,12886,88605,593766,4348497,42965155,470395612
%N Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,1 4,1 5,0 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 ...........1.0
%e ..........1.1.0
%e .........0.0.1.0
%e ........1.1.0.1.0
%e .......0.1.0.0.1.1
%e ......0.1.0.0.0.1.0
%e .....0.1.0.0.0.0.0.1
%e ....0.1.0.1.1.1.1.1.1
%e ...0.1.1.0.1.0.0.0.0.0
%K nonn
%O 6,2
%A _R. H. Hardin_ Jan 22 2009
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