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A155410 Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 3,2 3,3 4,2 5,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,94,297,1458,9766,53099,308101,2235851,20215398,229099105,

%T 2888943253,39401146662,624852187290

%N Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 3,2 3,3 4,2 5,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.

%C Same series for 1,0 1,1 2,0 3,0 3,1 4,1 5,2 5,3 polyhexes.

%e Maximal 10 X 10 X 10 example

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

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

%e ..........1.1.0

%e .........0.1.0.0

%e ........1.1.0.0.0

%e .......0.0.1.0.1.1

%e ......1.0.1.1.0.1.0

%e .....1.1.0.0.0.0.1.1

%e ....0.0.1.1.1.0.1.0.0

%e ...0.0.1.0.1.0.1.1.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)