A155378
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 3,2 4,2 4,3 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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%I #3 Mar 31 2012 12:35:23
%S 1,7,19,37,67,314,2337,14010,66473,405331,3843288,47944694,600390745,
%T 7673166649,120741723116,2464557255202
%N Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 3,2 4,2 4,3 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........0.0
%e ..........1.0.0
%e .........0.1.1.1
%e ........0.1.1.1.0
%e .......0.0.0.0.1.0
%e ......0.0.1.0.0.0.1
%e .....1.1.1.0.1.1.1.0
%e ....0.1.1.1.0.1.1.1.0
%e ...0.1.0.0.0.1.0.0.0.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
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