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A155218 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 polyhexes in any orientation on a planar nXnXn triangular grid. 0

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

%S 1,7,19,64,604,5668,60291,1139786,28911749,917529031,42684328880,

%T 2779416860900,242990212063594,29572386974464964,5010503933132486018,

%U 1166195763716912084751,374917567112932723176757

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

%e Maximal 13 X 13 X 13 example

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

%e ..............1.1

%e .............1.0.0

%e ............0.0.1.1

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

%e ..........1.0.0.1.0.0

%e .........0.0.1.1.0.1.1

%e ........1.0.0.0.0.1.0.0

%e .......1.0.1.0.1.0.0.1.1

%e ......0.1.0.1.0.1.1.0.0.1

%e .....1.0.0.1.0.0.0.0.1.0.0

%e ....1.0.1.0.0.1.1.0.1.0.1.0

%e ...0.1.0.1.1.0.0.1.0.1.0.1.1

%K nonn

%O 2,2

%A _R. H. Hardin_ Jan 22 2009

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)