%I #3 Mar 31 2012 12:35:22
%S 1,13,37,136,613,4136,32205,274737,3263659,46765263,810265107
%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 11 X 11 X 11 example
%e .............0
%e ............0.0
%e ...........1.0.0
%e ..........0.1.1.1
%e .........0.0.0.0.1
%e ........1.0.0.0.0.1
%e .......1.0.0.0.1.0.0
%e ......1.0.1.0.0.1.1.1
%e .....0.1.0.1.0.0.0.0.1
%e ....0.0.1.0.1.1.1.0.0.1
%e ...0.0.1.0.0.0.0.1.0.0.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
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