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A155405
Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 19, 37, 61, 179, 1570, 9884, 43279, 162911, 1062503, 13577598, 173995382, 1740580398, 16367827293, 223104829665, 4754997792283, 115851743032210
OFFSET
5,2
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.1
..........1.1.0
.........0.0.1.1
........0.1.1.0.0
.......0.0.0.1.0.0
......1.0.1.0.0.1.0
.....0.1.1.0.1.1.0.1
....1.1.0.1.0.0.1.1.0
...0.0.1.0.0.0.1.0.1.0
CROSSREFS
Sequence in context: A002407 A098484 A155443 * A155448 A155446 A155372
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved