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A155427 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,2 5,3 6,4 7,4 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,7,19,43,130,466,1972,9920,52566,311924,2236063,18426118

%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,2 5,3 6,4 7,4 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 10 X 10 X 10 example

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

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

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

%e .........0.1.0.1

%e ........0.1.0.1.0

%e .......0.1.0.1.0.0

%e ......0.0.1.0.1.0.0

%e .....0.0.1.0.1.0.0.0

%e ....0.0.1.0.1.0.0.0.0

%e ...0.0.0.1.0.1.0.0.0.0

%K nonn

%O 7,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified September 26 23:44 EDT 2022. Contains 357051 sequences. (Running on oeis4.)