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A155302 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,4,10,19,31,129,761,3423,12503,65847,587331,5621100,47590431,

%T 445495212,5880381069,98943434625,1748899641272,32546795958370,

%U 732964964303388

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

%e Maximal 13 X 13 X 13 example

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

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

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

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

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

%e ..........1.0.0.0.0.0

%e .........0.1.1.0.1.0.1

%e ........1.1.0.0.0.1.1.0

%e .......0.0.1.0.0.1.0.1.0

%e ......1.0.0.0.0.0.0.0.0.0

%e .....0.1.1.0.1.0.1.0.1.0.1

%e ....1.1.0.0.0.1.1.0.0.1.1.0

%e ...0.0.1.0.0.1.0.1.0.1.0.1.0

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified January 19 14:34 EST 2022. Contains 350466 sequences. (Running on oeis4.)