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%I #3 Mar 31 2012 12:35:23
%S 1,7,19,37,73,277,1483,7857,35137,178868,1263372,11050443,103009682,
%T 1012635463
%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 3,2 4,3 5,3 6,3 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........0.0
%e ..........0.0.0
%e .........0.0.0.0
%e ........0.1.1.1.0
%e .......0.1.0.0.0.0
%e ......0.0.1.0.1.1.1
%e .....1.1.1.0.1.0.0.0
%e ....0.0.0.0.0.1.0.0.0
%e ...0.0.0.1.1.1.0.0.0.0
%K nonn
%O 6,2
%A _R. H. Hardin_ Jan 22 2009