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A155329 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,94,403,2775,16917,98970,720295,7051084,87717398,1205893340,

%T 18539305616,340372026066,7675251517791

%N Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 10 X 10 X 10 example

%e ............0

%e ...........0.0

%e ..........0.1.0

%e .........1.1.1.1

%e ........0.0.0.1.0

%e .......0.1.0.0.1.0

%e ......1.1.0.0.0.0.1

%e .....0.1.0.0.0.0.1.0

%e ....0.1.1.0.1.1.1.1.0

%e ...0.0.0.1.0.0.1.0.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified August 12 04:52 EDT 2022. Contains 356067 sequences. (Running on oeis4.)