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A155241 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,13,37,181,1229,8379,80551,1100805,17145265,351104244,9283888557,

%T 306284314214

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

%e Maximal 11 X 11 X 11 example

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

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

%e ...........0.1.1

%e ..........1.0.0.1

%e .........0.1.1.0.1

%e ........0.0.0.1.0.0

%e .......1.0.1.0.1.0.0

%e ......1.0.1.0.0.0.1.1

%e .....1.0.1.0.1.1.1.0.0

%e ....0.1.0.1.0.0.0.0.1.1

%e ...0.1.0.1.0.0.1.1.1.0.0

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified January 31 16:13 EST 2023. Contains 359978 sequences. (Running on oeis4.)