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A155414
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 5,1 6,1 polyhexes in any orientation on a planar n X n X n triangular grid.
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0
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%I #5 Apr 17 2022 22:45:13
%S 1,7,19,52,254,1049,4097,19919,121609,822616,6525958,61351204
%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 5,1 6,1 polyhexes in any orientation on a planar n X n X n triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............1
%e ...........1.0
%e ..........0.1.0
%e .........1.1.0.1
%e ........1.0.0.0.1
%e .......0.1.0.0.1.0
%e ......0.1.0.0.0.1.1
%e .....0.0.0.0.0.0.0.1
%e ....0.1.1.0.1.1.0.1.0
%e ...1.1.0.1.1.0.0.0.1.0
%K nonn
%O 6,2
%A _R. H. Hardin_, Jan 22 2009
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