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A155430 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,3 5,4 6,5 7,5 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I #3 Mar 31 2012 12:35:23

%S 1,7,19,43,186,802,3291,15504,87663,541655,3932774,33121807

%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,3 5,4 6,5 7,5 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 11 X 11 X 11 example

%e .............1

%e ............0.1

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

%e ..........0.1.0.1

%e .........0.1.0.1.0

%e ........0.1.0.0.1.0

%e .......0.1.0.0.0.1.0

%e ......0.0.1.0.0.0.1.0

%e .....0.0.0.0.0.1.0.1.0

%e ....1.1.1.1.1.1.0.0.1.0

%e ...1.0.0.0.0.0.0.0.1.0.0

%K nonn

%O 7,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified March 28 14:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)