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A155337 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 4,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 40, 161, 562, 3058, 15699, 98124, 620233, 5239100, 48386446, 558536676, 7037622489, 106784846181 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
EXAMPLE
Maximal 9 X 9 X 9 example
...........0
..........0.0
.........1.1.1
........1.0.0.0
.......1.0.1.1.1
......0.1.0.0.0.1
.....1.0.1.0.1.0.1
....0.1.0.0.1.0.1.0
...0.0.1.1.1.0.1.0.0
CROSSREFS
Sequence in context: A155360 A155382 A155287 * A155402 A155232 A188281
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified May 19 14:45 EDT 2024. Contains 372698 sequences. (Running on oeis4.)