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A155439 Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 4,2 4,3 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 61, 224, 1849, 11422, 49927, 232499, 1829873, 22757837, 281467930, 3021365293, 36143191129, 595788136987, 13215044372764 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........1.0
..........1.0.1
.........0.1.1.0
........0.1.0.1.0
.......0.0.0.1.0.0
......0.1.1.0.0.1.0
.....1.1.0.0.1.0.1.1
....0.0.1.1.0.1.1.0.1
...0.1.1.0.0.0.0.1.0.0
CROSSREFS
Sequence in context: A155372 A155373 A155444 * A155441 A155447 A155340
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 22 14:00 EDT 2024. Contains 374499 sequences. (Running on oeis4.)