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A155281 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 4,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

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

%S 1,7,25,76,289,1579,11207,100558,1021474,12631241,194406300,

%T 3780423351,90519767008

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

%e Maximal 13 X 13 X 13 example

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

%e ..............0.1

%e .............0.0.1

%e ............1.0.0.1

%e ...........1.0.1.1.0

%e ..........1.0.0.0.0.0

%e .........1.0.0.0.1.0.0

%e ........0.1.1.0.1.0.1.1

%e .......1.0.0.0.1.0.1.0.1

%e ......1.0.0.0.1.0.0.0.0.1

%e .....1.0.0.1.0.1.1.0.1.0.1

%e ....1.0.0.1.0.0.0.0.1.0.0.0

%e ...0.1.1.0.1.1.1.1.0.1.1.1.1

%K nonn

%O 4,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)