A056940 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | 1 | | 1 | | | | | | | |
| | | | | | 1 | | 5 | | 1 | | | | | | |
| | | | | 1 | | 15 | | 15 | | 1 | | | | | |
| | | | 1 | | 35 | | 105 | | 35 | | 1 | | | | |
| | | 1 | | 70 | | 490 | | 490 | | 70 | | 1 | | | |
| | 1 | | 126 | | 1764 | | 4116 | | 1764 | | 126 | | 1 | | |
| 1 | | 210 | | 5292 | | 24696 | | 24696 | | 5292 | | 210 | | 1 | |
| 1 | | 330 | | 13860 | | 116424 | | 232848 | | 116424 | | 13860 | | 330 | | 1 |
A056940 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 5 | 15 | 35 | 70 | 126 | 210 | 330 | |
| 1 | 15 | 105 | 490 | 1764 | 5292 | 13860 | | |
| 1 | 35 | 490 | 4116 | 24696 | 116424 | | | |
| 1 | 70 | 1764 | 24696 | 232848 | | | | |
| 1 | 126 | 5292 | 116424 | | | | | |
| 1 | 210 | 13860 | | | | | | |
| 1 | 330 | | | | | | | |
| 1 | | | | | | | | |
A056940 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 5 | 15 | 35 | 70 | 126 | 210 | 330 |
| | 1 | 15 | 105 | 490 | 1764 | 5292 | 13860 |
| | | 1 | 35 | 490 | 4116 | 24696 | 116424 |
| | | | 1 | 70 | 1764 | 24696 | 232848 |
| | | | | 1 | 126 | 5292 | 116424 |
| | | | | | 1 | 210 | 13860 |
| | | | | | | 1 | 330 |
| | | | | | | | 1 |
|
