A001009 formatted as a triangular array:
| | | | | | 1 | | | | | | |
| | | | | 1 | | 1 | | | | | |
| | | | 1 | | 1 | | 1 | | | | |
| | | 1 | | 3 | | 4 | | 4 | | | |
| | 1 | | 11 | | 46 | | 56 | | 56 | | |
| 1 | | 53 | | 1064 | | 6552 | | 9408 | | 9408 | |
| 1 | | 309 | | 35792 | | 1293216 | | 11270400 | | 16942080 | | 16942080 |
A001009 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 3 | 11 | 53 | 309 | |
| 1 | 4 | 46 | 1064 | 35792 | | |
| 4 | 56 | 6552 | 1293216 | | | |
| 56 | 9408 | 11270400 | | | | |
| 9408 | 16942080 | | | | | |
| 16942080 | | | | | | |
A001009 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 3 | 11 | 53 | 309 |
| | 1 | 4 | 46 | 1064 | 35792 |
| | | 4 | 56 | 6552 | 1293216 |
| | | | 56 | 9408 | 11270400 |
| | | | | 9408 | 16942080 |
| | | | | | 16942080 |
|
