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A155447 Number of ways to place zero or more nonadjacent 2,0 3,1 3,2 4,2 4,3 4,4 5,2 6,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 61, 248, 1219, 8302, 40919, 212586, 1454728, 13983083, 157730943, 1851906541, 23225168793, 351573878630, 6540083828707 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,2
LINKS
EXAMPLE
Maximal 11 X 11 X 11 example
.............0
............0.0
...........0.0.1
..........0.1.1.0
.........1.1.1.0.0
........0.0.0.1.0.0
.......0.0.1.0.1.0.1
......0.1.1.0.0.0.1.0
.....1.1.1.0.1.1.1.0.0
....0.0.0.1.0.0.1.1.0.0
...0.0.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A155444 A155439 A155441 * A155340 A155409 A155406
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified July 17 17:52 EDT 2024. Contains 374377 sequences. (Running on oeis4.)