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A155314 Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 4,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,88,640,5031,26752,151436,1596386,24274062,343210818,

%T 4865294909,96524596845,2686621268327,85799102830215

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

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

%e Maximal 13 X 13 X 13 example

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

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

%e .............1.0.1

%e ............0.1.1.0

%e ...........0.1.0.0.0

%e ..........0.0.0.0.0.1

%e .........0.0.0.0.1.0.1

%e ........0.1.1.0.0.1.1.0

%e .......0.0.0.1.1.0.0.1.0

%e ......0.0.1.1.0.0.1.0.0.1

%e .....1.1.0.0.0.1.1.0.1.0.1

%e ....0.0.1.1.0.1.0.1.0.1.1.0

%e ...0.1.1.0.0.0.0.1.0.0.0.1.0

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified September 29 10:30 EDT 2022. Contains 357088 sequences. (Running on oeis4.)