%I #3 Mar 31 2012 12:35:22
%S 1,7,25,55,208,1168,8750,74240,701683,8051955,120548805,2289918377,
%T 52736906771
%N Number of ways to place zero or more nonadjacent 1,0 2,0 3,1 3,2 4,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 11 X 11 X 11 example
%e .............0
%e ............0.0
%e ...........0.0.0
%e ..........1.1.0.1
%e .........1.0.0.0.1
%e ........0.1.0.0.1.0
%e .......0.1.0.0.0.1.0
%e ......0.0.1.0.1.1.0.1
%e .....1.0.0.0.0.0.0.0.1
%e ....0.1.1.0.1.0.0.1.1.0
%e ...0.0.0.1.1.0.1.1.0.0.0
%K nonn
%O 4,2
%A _R. H. Hardin_ Jan 22 2009