A155868 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | 1 | | 1 | | | | | | | |
| | | | | | 1 | | 1 | | 1 | | | | | | |
| | | | | 1 | | 6 | | 6 | | 1 | | | | | |
| | | | 1 | | 36 | | 121 | | 36 | | 1 | | | | |
| | | 1 | | 240 | | 1750 | | 1750 | | 240 | | 1 | | | |
| | 1 | | 1800 | | 23290 | | 50625 | | 23290 | | 1800 | | 1 | | |
| 1 | | 15120 | | 308700 | | 1193640 | | 1193640 | | 308700 | | 15120 | | 1 | |
| 1 | | 141120 | | 4207896 | | 25738720 | | 45819361 | | 25738720 | | 4207896 | | 141120 | | 1 |
A155868 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 6 | 36 | 240 | 1800 | 15120 | 141120 | |
| 1 | 6 | 121 | 1750 | 23290 | 308700 | 4207896 | | |
| 1 | 36 | 1750 | 50625 | 1193640 | 25738720 | | | |
| 1 | 240 | 23290 | 1193640 | 45819361 | | | | |
| 1 | 1800 | 308700 | 25738720 | | | | | |
| 1 | 15120 | 4207896 | | | | | | |
| 1 | 141120 | | | | | | | |
| 1 | | | | | | | | |
A155868 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 6 | 36 | 240 | 1800 | 15120 | 141120 |
| | 1 | 6 | 121 | 1750 | 23290 | 308700 | 4207896 |
| | | 1 | 36 | 1750 | 50625 | 1193640 | 25738720 |
| | | | 1 | 240 | 23290 | 1193640 | 45819361 |
| | | | | 1 | 1800 | 308700 | 25738720 |
| | | | | | 1 | 15120 | 4207896 |
| | | | | | | 1 | 141120 |
| | | | | | | | 1 |
|
