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A155339 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 3,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 3, 7, 13, 23, 37, 183, 1053, 5351, 24397, 99215, 617661, 5897471, 64288141, 714391583, 7672307261, 95370104207, 1561595349917, 31946273565055 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.0
..........0.1.1
.........1.1.0.1
........0.0.0.0.0
.......0.1.0.1.1.0
......1.0.1.1.0.0.1
.....0.1.0.0.1.0.1.0
....1.1.0.0.1.0.0.1.1
...1.0.1.1.0.0.1.1.0.1
CROSSREFS
Sequence in context: A053599 A212146 A136851 * A122886 A154691 A306902
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified June 21 21:50 EDT 2024. Contains 373559 sequences. (Running on oeis4.)