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A155316
Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 3,0 3,3 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 4, 10, 19, 34, 64, 439, 3090, 19210, 101422, 504509, 4329846, 55414347, 830264641, 12430929701, 182359363367, 3254398810400, 78220337119222
OFFSET
3,2
COMMENTS
Same series for 0,0 1,0 1,1 2,0 2,1 2,2 3,0 3,3 polyhexes.
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.1
..........1.0.1
.........1.0.0.1
........0.0.1.0.0
.......0.0.0.1.0.0
......1.0.0.0.1.0.1
.....1.0.1.1.1.1.0.1
....1.0.0.0.0.0.0.0.1
...1.1.1.1.0.0.1.1.1.1
CROSSREFS
Sequence in context: A301155 A301215 A155389 * A346760 A038418 A301206
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved