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A155417 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 3,2 4,2 5,3 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 103, 427, 2227, 11583, 57485, 387397, 3244887, 30976146, 318914841 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,2
LINKS
EXAMPLE
Maximal 11 X 11 X 11 example
.............0
............0.0
...........0.0.0
..........0.0.0.1
.........0.1.1.1.0
........1.1.1.0.0.0
.......1.0.0.0.0.0.0
......0.0.0.1.0.0.1.1
.....0.1.1.1.0.1.1.0.0
....1.1.1.0.0.1.1.0.0.0
...1.0.0.0.1.1.0.0.0.0.0
CROSSREFS
Sequence in context: A155299 A155379 A155243 * A155416 A155391 A155400
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified March 28 15:28 EDT 2024. Contains 371254 sequences. (Running on oeis4.)