A058720 as a triangular array
| | | | | | | 1 |
| | | | | | | 1 | | 1 |
| | | | | | 1 | | 5 | | 1 |
| | | | | 1 | | 31 | | 16 | | 1 |
| | | | 1 | | 352 | | 337 | | 42 | | 1 |
| | | 1 | | 8389 | | 18700 | | 2570 | | 99 | | 1 |
| | 1 | | 433038 | | 7642631 | | 907647 | | 16865 | | 219 | | 1 |
|
A058720 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 5 | 31 | 352 | 8389 | 433038
| | 1 | 16 | 337 | 18700 | 7642631
| | 1 | 42 | 2570 | 907647
| | 1 | 99 | 16865
| | 1 | 219
| | 1
|
A058720 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 5 | 31 | 352 | 8389 | 433038
| | | 1 | 16 | 337 | 18700 | 7642631
| | | | 1 | 42 | 2570 | 907647
| | | | | 1 | 99 | 16865
| | | | | | 1 | 219
| | | | | | | 1
|
|
