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A155352 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,0 4,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 61, 275, 2315, 14549, 65253, 367867, 3643355, 50258373, 656861493, 8054133067, 125882858619, 2726987375461, 73216488029301, 2108368359421323, 66596647574072923 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
EXAMPLE
Maximal 9 X 9 X 9 example
...........0
..........1.1
.........0.0.1
........1.0.1.0
.......0.1.1.0.0
......0.0.0.0.1.1
.....1.0.1.0.1.0.1
....1.0.0.1.0.0.0.1
...0.1.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A155340 A155409 A155406 * A155361 A155315 A155323
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 19 15:21 EDT 2024. Contains 374410 sequences. (Running on oeis4.)