|
| |
|
|
A154037
|
|
Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 3 X 3 X 3 subtriangle summing to 4.
|
|
0
| |
|
|
0, 14, 8, 0, 29, 0, 0, 33, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 3,2
|
|
|
COMMENTS
| Pattern 0 0 27 starts at n=11 and continues through at least n=60.
|
|
|
EXAMPLE
| Maximal zeros solution for n=13
..............0
.............0.2
............2.0.0
...........0.0.2.0
..........0.2.0.0.2
.........2.0.0.2.0.0
........0.0.2.0.0.2.0
.......0.2.0.0.2.0.0.2
......2.0.0.2.0.0.2.0.0
.....0.0.2.0.0.2.0.0.2.0
....0.2.0.0.2.0.0.2.0.0.2
...2.0.0.2.0.0.2.0.0.2.0.0
..0.0.2.0.0.2.0.0.2.0.0.2.0
|
|
|
CROSSREFS
| Sequence in context: A135638 A040185 A033964 * A119871 A010237 A035418
Adjacent sequences: A154034 A154035 A154036 * A154038 A154039 A154040
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Jan 04 2009
|
| |
|
|
