A050155 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 3 | | 1 |
| | | | | | | | | 9 | | 5 | | 1 |
| | | | | | | | 28 | | 20 | | 7 | | 1 |
| | | | | | | 90 | | 75 | | 35 | | 9 | | 1 |
| | | | | | 297 | | 275 | | 154 | | 54 | | 11 | | 1 |
| | | | | 1001 | | 1001 | | 637 | | 273 | | 77 | | 13 | | 1 |
| | | | 3432 | | 3640 | | 2548 | | 1260 | | 440 | | 104 | | 15 | | 1 |
| | | 11934 | | 13260 | | 9996 | | 5508 | | 2244 | | 663 | | 135 | | 17 | | 1 |
| | 41990 | | 48450 | | 38760 | | 23256 | | 10659 | | 3705 | | 950 | | 170 | | 19 | | 1 |
|
A050155 as a square array
1 | 3 | 9 | 28 | 90 | 297 | 1001 | 3432 | 11934 | 41990
| 1 | 5 | 20 | 75 | 275 | 1001 | 3640 | 13260 | 48450
| 1 | 7 | 35 | 154 | 637 | 2548 | 9996 | 38760
| 1 | 9 | 54 | 273 | 1260 | 5508 | 23256
| 1 | 11 | 77 | 440 | 2244 | 10659
| 1 | 13 | 104 | 663 | 3705
| 1 | 15 | 135 | 950
| 1 | 17 | 170
| 1 | 19
| 1
|
A050155 as an upper right triangle
1 | 3 | 9 | 28 | 90 | 297 | 1001 | 3432 | 11934 | 41990
| | 1 | 5 | 20 | 75 | 275 | 1001 | 3640 | 13260 | 48450
| | | 1 | 7 | 35 | 154 | 637 | 2548 | 9996 | 38760
| | | | 1 | 9 | 54 | 273 | 1260 | 5508 | 23256
| | | | | 1 | 11 | 77 | 440 | 2244 | 10659
| | | | | | 1 | 13 | 104 | 663 | 3705
| | | | | | | 1 | 15 | 135 | 950
| | | | | | | | 1 | 17 | 170
| | | | | | | | | 1 | 19
| | | | | | | | | | 1
|
|