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A155263
Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,1 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 13, 37, 100, 864, 5014, 38110, 471622, 5596502, 85749877, 1841914431, 44860386415
OFFSET
4,2
COMMENTS
Same series for 1,0 1,1 2,0 3,0 3,1 4,0 polyhexes.
EXAMPLE
Maximal 11 X 11 X 11 example
.............0
............0.1
...........0.0.1
..........1.0.1.0
.........1.0.0.1.1
........0.1.0.0.1.0
.......1.1.0.0.0.0.1
......0.1.0.1.0.0.0.1
.....0.0.0.0.1.1.0.1.0
....1.1.0.1.0.0.1.0.1.1
...0.0.1.1.1.0.1.1.0.1.0
CROSSREFS
Sequence in context: A043970 A183339 A331763 * A155228 A126367 A139926
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved