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A155243
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 19, 37, 102, 1264, 9091, 48176, 418130, 8182255, 143523182, 2278072430, 53254810257, 2027413206531, 84728501324609, 3776435859240528, 226344677177142828, 18987749209358606115, 1902812184280545994272
OFFSET
3,2
COMMENTS
Same series for 1,0 1,1 2,1 2,2 3,1 3,2 polyhexes.
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........1.1
..........1.0.1
.........0.0.1.0
........1.1.0.0.1
.......1.0.0.1.0.1
......0.1.1.0.1.1.0
.....1.0.0.0.0.0.0.1
....1.0.1.0.0.0.1.0.1
...0.1.1.0.0.0.0.1.1.0
CROSSREFS
Sequence in context: A155437 A155299 A155379 * A155417 A155416 A155391
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved