A155366
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Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 4,0 5,0 5,1 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 1,4,13,28,135,642,2485,11927,77152,533119,4074088,40881018,462133122
%N Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 4,0 5,0 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 9 X 9 X 9 example
%e ...........1
%e ..........1.1
%e .........0.0.1
%e ........1.0.0.1
%e .......1.1.0.0.1
%e ......1.0.0.0.1.1
%e .....1.0.0.0.0.0.0
%e ....1.0.0.1.0.0.0.1
%e ...1.1.0.1.1.1.1.1.1
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
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