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A155431 Number of ways to place zero or more nonadjacent 2,0 2,1 3,0 3,1 3,2 3,3 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,94,344,2238,14169,77290,503317,4355803,49651747,642476027,

%T 8840925123,141069431209,2761281750433

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

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

%e Maximal 10 X 10 X 10 example

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

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

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

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

%e ........0.1.0.0.0

%e .......0.1.0.0.1.0

%e ......1.0.0.0.0.1.1

%e .....0.1.0.0.0.0.1.1

%e ....0.1.1.1.1.0.1.1.0

%e ...0.0.1.1.0.0.1.0.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified August 12 13:59 EDT 2022. Contains 356077 sequences. (Running on oeis4.)