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A155388 Number of ways to place zero or more nonadjacent 1,1 2,1 3,1 4,1 5,1 6,0 6,1 7,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

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

%S 1,7,19,37,182,832,3129,13751,77260,501790,3395893,27342352

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

%e Maximal 11 X 11 X 11 example

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

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

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

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

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

%e ........0.1.0.0.1.0

%e .......0.1.0.0.0.1.1

%e ......0.1.0.0.0.1.0.0

%e .....0.1.0.0.0.0.0.0.1

%e ....1.1.0.1.1.1.1.1.1.0

%e ...0.0.1.0.0.0.0.0.0.1.0

%K nonn

%O 7,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)