A155331
|
|
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,0 5,0 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.
|
|
0
|
|
%I #3 Mar 31 2012 12:35:22
%S 1,4,13,28,131,616,2577,12364,77884,560672,4490012,45293635,525483762
%N Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,0 5,0 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 9 X 9 X 9 example
%e ...........0
%e ..........1.1
%e .........1.0.0
%e ........1.0.1.1
%e .......1.0.0.0.1
%e ......1.0.0.0.0.1
%e .....0.1.0.0.0.0.1
%e ....1.0.0.0.0.1.0.1
%e ...0.1.1.1.1.1.0.1.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
|