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A155424 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,3 4,4 5,3 5,4 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,97,385,1752,10474,62128,377334,2749676,25769709,285285035,

%T 3566431622,50164255930,808544899113

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

%e Maximal 10 X 10 X 10 example

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

%e ...........1.1

%e ..........1.1.0

%e .........0.0.1.0

%e ........0.0.0.1.1

%e .......1.0.0.1.0.0

%e ......0.1.1.0.0.0.0

%e .....0.1.0.0.1.0.0.1

%e ....1.1.0.0.1.1.1.1.0

%e ...0.1.1.0.0.1.0.0.1.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified October 3 10:36 EDT 2022. Contains 357231 sequences. (Running on oeis4.)