|
Search: id:A155305
|
|
|
| A155305 |
|
Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid. |
|
+0
1
|
|
| 1, 7, 25, 64, 217, 1298, 10738, 90390, 827265, 9950319, 159818687, 3209355205, 75527888278, 2156343784054
(list; graph; listen)
|
|
|
OFFSET
|
4,2
|
|
|
EXAMPLE
|
Maximal 11 X 11 X 11 example
.............1
............0.1
...........0.1.0
..........0.0.1.1
.........0.0.1.0.0
........1.0.0.0.0.1
.......0.1.1.0.1.1.0
......1.1.0.0.0.0.1.1
.....1.0.0.1.0.1.0.0.1
....0.0.1.1.0.0.1.1.0.0
...0.1.1.0.1.0.1.0.1.1.0
|
|
CROSSREFS
|
Sequence in context: A118396 A001845 A127765 this_sequence A155290 A056685 A001296
Adjacent sequences: A155302 A155303 A155304 this_sequence A155306 A155307 A155308
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net) Jan 22 2009
|
|
|
Search completed in 0.004 seconds
|
