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%I #3 Mar 31 2012 12:35:22
%S 1,4,10,19,46,196,1032,4951,26637,188993,1709202,17529087,202068348,
%T 2791380782,47026449297,942262652574,22038920608740,607442111573650
%N Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 3,2 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 9 X 9 X 9 example
%e ...........0
%e ..........1.0
%e .........0.1.1
%e ........0.1.1.0
%e .......0.0.0.1.0
%e ......1.0.0.0.0.0
%e .....0.1.1.0.0.1.0
%e ....0.1.1.0.1.1.1.1
%e ...0.0.0.1.0.0.1.0.0
%K nonn
%O 4,2
%A _R. H. Hardin_ Jan 22 2009
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