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A155364 Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 2,2 3,1 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,37,176,778,2857,13120,90210,607102,4426307,43683350,478373407

%N Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 2,2 3,1 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 10 X 10 X 10 example

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

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

%e ..........0.1.0

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

%e ........0.1.0.1.0

%e .......0.1.0.0.1.1

%e ......0.1.0.0.1.1.0

%e .....0.1.0.0.0.0.0.1

%e ....1.1.0.1.1.1.1.1.1

%e ...0.1.1.0.0.0.0.0.1.0

%K nonn

%O 6,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified January 28 22:30 EST 2022. Contains 350669 sequences. (Running on oeis4.)