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A155340 Number of ways to place zero or more nonadjacent 1,0 2,0 3,1 3,2 3,3 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 61, 257, 2034, 12328, 53385, 258324, 2321815, 29642532, 362215522, 3875443645, 50070184746, 929942357232, 22058196563695 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
COMMENTS
Same series for 1,1 2,1 2,2 3,0 3,1 4,2 4,3 5,3 polyhexes.
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.1
..........0.0.1
.........1.1.1.0
........0.0.0.1.0
.......0.0.0.1.0.0
......0.1.1.0.0.0.1
.....1.1.0.0.1.0.1.0
....1.0.1.0.0.1.1.0.0
...0.0.0.1.0.0.0.1.1.0
CROSSREFS
Sequence in context: A155439 A155441 A155447 * A155409 A155406 A155352
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified June 19 03:10 EDT 2024. Contains 373492 sequences. (Running on oeis4.)