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A155305 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid. 0

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

%S 1,7,25,64,217,1298,10738,90390,827265,9950319,159818687,3209355205,

%T 75527888278,2156343784054

%N Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,4 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 ..........0.0.1.1

%e .........0.0.1.0.0

%e ........1.0.0.0.0.1

%e .......0.1.1.0.1.1.0

%e ......1.1.0.0.0.0.1.1

%e .....1.0.0.1.0.1.0.0.1

%e ....0.0.1.1.0.0.1.1.0.0

%e ...0.1.1.0.1.0.1.0.1.1.0

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 19 08:06 EDT 2024. Contains 371782 sequences. (Running on oeis4.)