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A155292
Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 25, 55, 229, 1363, 11186, 97334, 991531, 12805571, 217664977, 4668424395, 121771975984
OFFSET
4,2
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........0.1
..........0.1.0
.........0.1.1.0
........0.0.0.1.0
.......1.1.0.0.0.1
......0.0.1.1.1.0.1
.....0.1.0.1.0.0.1.0
....1.1.1.0.0.0.1.1.0
...0.0.0.1.1.0.0.0.1.0
CROSSREFS
Sequence in context: A155306 A155240 A155298 * A155276 A155270 A155256
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved