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A155288
Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 3,2 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 25, 55, 187, 1099, 9278, 75511, 645474, 7422000, 116915443, 2299714950, 51760679784, 1407030104754
OFFSET
4,2
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........1.0
..........0.1.1
.........0.1.0.1
........0.0.0.0.1
.......1.1.1.0.0.0
......0.0.0.1.1.0.0
.....0.1.0.1.0.0.1.0
....1.1.0.0.0.1.1.0.0
...0.0.1.1.1.0.0.1.1.1
CROSSREFS
Sequence in context: A155260 A155244 A155310 * A155293 A155311 A155289
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved