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A155390
Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 4,1 5,1 6,1 7,1 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 19, 78, 382, 1679, 8329, 45625, 259832, 1747805, 14220936
OFFSET
7,2
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.0
..........1.0.0
.........1.0.1.0
........0.1.0.1.0
.......0.1.0.0.1.0
......0.1.0.0.0.1.1
.....0.1.0.0.0.0.0.1
....0.0.0.1.1.1.1.0.1
...1.1.1.1.0.0.0.0.0.1
CROSSREFS
Sequence in context: A111011 A144723 A062551 * A269784 A237436 A300556
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved