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A155342 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,82,361,2515,15385,83649,564736,5375347,66177036,879906596,

%T 12668769870,218134701822,4684620580146

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

%C Same series for 1,1 2,0 2,1 3,1 3,2 4,1 4,2 5,3 polyhexes.

%e Maximal 10 X 10 X 10 example

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

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

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

%e .........1.0.1.1

%e ........0.1.1.0.0

%e .......0.1.0.0.1.0

%e ......1.0.0.0.0.1.1

%e .....0.1.1.0.0.1.0.0

%e ....0.1.0.1.1.0.1.1.0

%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 23 11:24 EDT 2019. Contains 326222 sequences. (Running on oeis4.)