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A155348 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,3 4,4 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,4,10,19,43,128,488,2206,10000,48377,276446,1912377,15358537,

%T 137081258,1363205310,15492211198,203922791257,3090086318993

%N Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,3 4,4 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 ..........1.0.0

%e .........0.1.1.0

%e ........0.1.0.0.1

%e .......1.1.0.1.1.0

%e ......0.0.1.0.0.1.0

%e .....0.1.0.0.1.0.1.1

%e ....0.0.1.1.1.0.1.0.0

%e ...0.0.1.0.0.1.0.0.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified May 20 23:05 EDT 2022. Contains 353886 sequences. (Running on oeis4.)