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A155258 Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 4,0 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I #3 Mar 31 2012 12:35:22

%S 1,7,25,90,688,4109,25041,287360,3402527,48602011,1011814868,

%T 22922047752

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

%e Maximal 13 X 13 X 13 example

%e ...............1

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

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

%e ............1.0.1.1

%e ...........1.1.0.0.1

%e ..........0.0.0.0.0.1

%e .........1.0.1.1.0.0.1

%e ........1.0.0.1.0.1.0.0

%e .......1.0.1.0.1.0.1.0.1

%e ......1.0.1.1.0.1.0.1.0.1

%e .....1.1.0.0.1.0.1.0.1.0.1

%e ....0.0.0.1.0.1.0.0.1.1.0.1

%e ...1.1.1.1.1.0.1.0.0.0.0.1.1

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 25 15:00 EDT 2024. Contains 371989 sequences. (Running on oeis4.)