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A155304 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 3,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,13,37,73,309,2413,28415,205131,1898471,29029014,631146446,

%T 14579044094,368315888227,12424744049760,572778669577292

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

%e Maximal 11 X 11 X 11 example

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

%e ............1.1

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

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

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

%e ........1.1.0.0.0.1

%e .......1.0.0.1.1.0.1

%e ......0.1.1.0.0.1.1.0

%e .....1.0.0.0.0.0.0.0.1

%e ....1.0.1.1.0.0.1.1.0.1

%e ...0.1.1.0.0.0.0.0.1.1.0

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)