A171830 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 2 | | 2 |
| | | | | | | | 3 | | 4 | | 3 |
| | | | | | | 16 | | 24 | | 24 | | 16 |
| | | | | | 45 | | 144 | | 162 | | 144 | | 45 |
| | | | | 192 | | 480 | | 1152 | | 1152 | | 480 | | 192 |
| | | | 1050 | | 2400 | | 4500 | | 9600 | | 4500 | | 2400 | | 1050 |
| | | 6912 | | 15120 | | 25920 | | 43200 | | 43200 | | 25920 | | 15120 | | 6912 |
| | 52920 | | 112896 | | 185220 | | 282240 | | 220500 | | 282240 | | 185220 | | 112896 | | 52920 |
|
A171830 as a square array
1 | 2 | 3 | 16 | 45 | 192 | 1050 | 6912 | 52920
| 2 | 4 | 24 | 144 | 480 | 2400 | 15120 | 112896
| 3 | 24 | 162 | 1152 | 4500 | 25920 | 185220
| 16 | 144 | 1152 | 9600 | 43200 | 282240
| 45 | 480 | 4500 | 43200 | 220500
| 192 | 2400 | 25920 | 282240
| 1050 | 15120 | 185220
| 6912 | 112896
| 52920
|
A171830 as an upper right triangle
1 | 2 | 3 | 16 | 45 | 192 | 1050 | 6912 | 52920
| | 2 | 4 | 24 | 144 | 480 | 2400 | 15120 | 112896
| | | 3 | 24 | 162 | 1152 | 4500 | 25920 | 185220
| | | | 16 | 144 | 1152 | 9600 | 43200 | 282240
| | | | | 45 | 480 | 4500 | 43200 | 220500
| | | | | | 192 | 2400 | 25920 | 282240
| | | | | | | 1050 | 15120 | 185220
| | | | | | | | 6912 | 112896
| | | | | | | | | 52920
|
|