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A155431 Number of ways to place zero or more nonadjacent 2,0 2,1 3,0 3,1 3,2 3,3 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 94, 344, 2238, 14169, 77290, 503317, 4355803, 49651747, 642476027, 8840925123, 141069431209, 2761281750433 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,2
COMMENTS
Same series for 2,0 2,1 3,0 3,2 3,3 4,1 5,1 polyhexes.
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........0.0
..........1.1.0
.........1.1.1.1
........0.1.0.0.0
.......0.1.0.0.1.0
......1.0.0.0.0.1.1
.....0.1.0.0.0.0.1.1
....0.1.1.1.1.0.1.1.0
...0.0.1.1.0.0.1.0.0.0
CROSSREFS
Sequence in context: A155429 A155346 A155398 * A155329 A155424 A155349
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)