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A155248
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,1 3,0 3,1 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 19, 37, 209, 1577, 10287, 78555, 928301, 14022349, 239786776, 5085100887, 142197577695, 5014181558576, 216402828969373
OFFSET
3,2
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.0
..........0.0.0
.........0.0.1.1
........1.1.0.1.1
.......1.1.0.0.1.1
......1.1.0.0.0.0.0
.....0.0.0.1.1.0.1.1
....1.1.1.0.1.1.0.1.1
...0.1.1.1.0.1.1.0.1.1
CROSSREFS
Sequence in context: A155388 A155367 A155357 * A027452 A051937 A119327
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved