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A155372 Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 3,3 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,61,206,1719,10790,47817,214975,1559070,18834488,235320165,

%T 2540394252,29093246624,443617991373,9324012818913

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

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

%e Maximal 10 X 10 X 10 example

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

%e ...........1.0

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

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

%e ........0.0.1.0.0

%e .......0.0.0.1.0.0

%e ......1.0.1.0.0.0.1

%e .....0.1.1.0.1.1.1.0

%e ....0.0.1.1.0.0.1.1.1

%e ...0.0.1.0.1.0.1.0.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified November 29 04:22 EST 2021. Contains 349416 sequences. (Running on oeis4.)