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A155264
Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 13, 37, 79, 343, 3883, 32621, 226143, 2442908, 45791330, 912526379, 19385105798, 531941059542
OFFSET
4,2
COMMENTS
Same series for 0,0 1,0 2,0 2,1 3,2 4,2 polyhexes.
EXAMPLE
Maximal 11 X 11 X 11 example
.............1
............1.1
...........0.0.1
..........1.0.1.0
.........1.0.1.0.0
........1.0.0.0.0.0
.......0.1.1.0.1.1.1
......0.0.1.0.1.0.1.0
.....1.1.0.0.1.0.0.0.1
....0.1.0.0.0.0.1.0.1.0
...0.0.1.1.1.0.1.1.1.0.0
CROSSREFS
Sequence in context: A089114 A163675 A152610 * A155267 A157837 A039367
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved