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A155377 Number of ways to place zero or more nonadjacent 1,1 2,1 3,1 3,2 4,0 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I #3 Mar 31 2012 12:35:23

%S 1,7,19,37,153,637,2331,11267,74210,497308,3765392,35883138,379301928,

%T 4460755344

%N Number of ways to place zero or more nonadjacent 1,1 2,1 3,1 3,2 4,0 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 ..........0.1.1

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

%e ........0.1.0.1.0

%e .......0.1.0.1.1.0

%e ......0.1.1.0.0.1.0

%e .....1.1.0.0.1.0.0.0

%e ....0.1.0.1.1.1.1.1.1

%e ...0.1.0.0.0.0.0.1.0.0

%K nonn

%O 6,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)