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A155380 Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 3,1 3,2 4,2 5,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 19, 40, 120, 445, 2107, 10099, 50833, 296830, 2080084, 17252149, 164656985, 1767665953, 21481633518, 300312864497 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.0
..........1.0.0
.........1.1.1.0
........0.0.1.1.1
.......1.1.0.0.1.0
......0.1.0.0.0.0.1
.....0.1.1.0.0.1.1.1
....0.0.1.0.1.1.1.0.0
...0.0.1.1.0.1.0.0.0.0
CROSSREFS
Sequence in context: A008118 A301160 A097116 * A155445 A133952 A155348
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 25 15:49 EDT 2024. Contains 374612 sequences. (Running on oeis4.)