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A155343 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 3,2 4,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 55, 192, 702, 3882, 23422, 155527, 1170160, 10636314, 113496925, 1456900734, 21993819116 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
EXAMPLE
Maximal 12 X 12 X 12 example
..............0
.............0.0
............0.1.0
...........1.1.1.1
..........1.0.0.0.1
.........0.0.1.1.0.0
........0.1.1.0.0.1.0
.......1.0.1.0.1.1.1.1
......1.0.1.0.1.0.0.0.1
.....0.1.0.1.0.0.0.1.0.0
....0.1.1.0.0.0.1.1.1.1.0
...0.0.0.1.1.0.1.0.0.0.1.0
CROSSREFS
Sequence in context: A124697 A155426 A155421 * A155341 A189589 A025576
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 15 19:27 EDT 2024. Contains 374334 sequences. (Running on oeis4.)