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A155419 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,1 5,1 6,2 7,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 52, 207, 826, 3466, 17019, 96663, 608856, 4591353, 39344454 (list; graph; refs; listen; history; text; internal format)
OFFSET
7,2
LINKS
EXAMPLE
Maximal 11 X 11 X 11 example
.............1
............1.0
...........0.1.0
..........0.1.0.1
.........0.1.0.0.1
........0.1.0.0.1.0
.......0.0.1.0.0.1.0
......0.0.1.0.0.0.1.0
.....0.0.0.0.1.1.0.1.0
....0.1.1.1.1.0.0.1.0.0
...1.1.0.0.0.0.0.0.1.0.0
CROSSREFS
Sequence in context: A155385 A155345 A155309 * A155246 A155414 A155374
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)