A156917 formatted as a triangular array:
| | | | | | 1 | | | | | | |
| | | | | 1 | | 1 | | | | | |
| | | | 1 | | 40 | | 1 | | | | |
| | | 1 | | 1210 | | 1210 | | 1 | | | |
| | 1 | | 33880 | | 1024870 | | 33880 | | 1 | | |
| 1 | | 925771 | | 784128037 | | 784128037 | | 925771 | | 1 | |
| 1 | | 25095280 | | 580812061522 | | 16262737722616 | | 580812061522 | | 25095280 | | 1 |
A156917 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 40 | 1210 | 33880 | 925771 | 25095280 | |
| 1 | 1210 | 1024870 | 784128037 | 580812061522 | | |
| 1 | 33880 | 784128037 | 16262737722616 | | | |
| 1 | 925771 | 580812061522 | | | | |
| 1 | 25095280 | | | | | |
| 1 | | | | | | |
A156917 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 40 | 1210 | 33880 | 925771 | 25095280 |
| | 1 | 1210 | 1024870 | 784128037 | 580812061522 |
| | | 1 | 33880 | 784128037 | 16262737722616 |
| | | | 1 | 925771 | 580812061522 |
| | | | | 1 | 25095280 |
| | | | | | 1 |
|
