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A155308 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I #3 Mar 31 2012 12:35:22

%S 1,13,37,112,595,3710,30281,253489,2990675,42651723,721885534,

%T 15178835272

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

%e Maximal 13 X 13 X 13 example

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

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

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

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

%e ...........0.0.0.1.1

%e ..........0.1.1.0.0.1

%e .........0.1.0.0.1.0.0

%e ........1.1.0.0.0.1.1.0

%e .......1.0.0.0.0.0.0.1.0

%e ......0.0.1.0.0.1.0.0.1.1

%e .....0.1.1.0.1.1.0.1.0.0.0

%e ....0.1.0.0.1.0.0.0.1.1.1.0

%e ...1.1.0.1.1.0.0.0.0.0.0.1.1

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)