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A155385 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 3,1 4,1 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 52, 181, 571, 2900, 15410, 91393, 670564, 5234213, 49806306, 539502855 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,2
LINKS
EXAMPLE
Maximal 12 X 12 X 12 example
..............1
.............0.1
............1.0.1
...........1.0.1.1
..........1.0.0.1.0
.........1.1.0.1.0.1
........0.1.0.1.0.0.1
.......0.0.1.0.0.0.0.1
......1.0.0.1.0.0.0.1.1
.....0.1.0.0.0.0.0.0.1.0
....0.0.1.1.0.0.0.0.1.0.0
...0.0.0.1.1.1.1.0.1.0.0.0
CROSSREFS
Sequence in context: A100450 A155423 A155347 * A155345 A155309 A155419
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 16 12:01 EDT 2024. Contains 374348 sequences. (Running on oeis4.)