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A155409 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,2 4,4 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 61, 275, 1767, 10441, 45245, 228435, 1707103, 18329337, 206589973, 2188693403, 25302969335, 385488957361, 7496386108989 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.1
..........1.0.1
.........0.1.1.0
........0.0.0.1.1
.......1.0.0.1.0.0
......1.0.1.0.0.0.0
.....0.1.1.0.1.1.0.1
....1.1.0.0.0.0.1.1.0
...0.0.1.0.0.1.1.0.1.0
CROSSREFS
Sequence in context: A155441 A155447 A155340 * A155406 A155352 A155361
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 18 17:25 EDT 2024. Contains 374388 sequences. (Running on oeis4.)