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A155331 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,0 5,0 6,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 13, 28, 131, 616, 2577, 12364, 77884, 560672, 4490012, 45293635, 525483762 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
LINKS
EXAMPLE
Maximal 9 X 9 X 9 example
...........0
..........1.1
.........1.0.0
........1.0.1.1
.......1.0.0.0.1
......1.0.0.0.0.1
.....0.1.0.0.0.0.1
....1.0.0.0.0.1.0.1
...0.1.1.1.1.1.0.1.0
CROSSREFS
Sequence in context: A155238 A155320 A155279 * A155387 A155366 A340002
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified May 9 09:10 EDT 2024. Contains 372347 sequences. (Running on oeis4.)