A198715 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 2 | | 4 | | 2 |
| | | | | | | 5 | | 25 | | 25 | | 5 |
| | | | | | 14 | | 172 | | 401 | | 172 | | 14 |
| | | | | 41 | | 1201 | | 6548 | | 6548 | | 1201 | | 41 |
| | | | 122 | | 8404 | | 107042 | | 250031 | | 107042 | | 8404 | | 122 |
| | | 365 | | 58825 | | 1749965 | | 9548295 | | 9548295 | | 1749965 | | 58825 | | 365 |
| | 1094 | | 411772 | | 28609241 | | 364637102 | | 851787199 | | 364637102 |
|
A198715 as a square array
1 | 1 | 2 | 5 | 14 | 41 | 122 | 365 | 1094
| 1 | 4 | 25 | 172 | 1201 | 8404 | 58825 | 411772
| 2 | 25 | 401 | 6548 | 107042 | 1749965 | 28609241
| 5 | 172 | 6548 | 250031 | 9548295 | 364637102
| 14 | 1201 | 107042 | 9548295 | 851787199
| 41 | 8404 | 1749965 | 364637102
| 122 | 58825
| 365
|
A198715 as an upper right triangle
1 | 1 | 2 | 5 | 14 | 41 | 122 | 365 | 1094
| | 1 | 4 | 25 | 172 | 1201 | 8404 | 58825 | 411772
| | | 2 | 25 | 401 | 6548 | 107042 | 1749965 | 28609241
| | | | 5 | 172 | 6548 | 250031 | 9548295 | 364637102
| | | | | 14 | 1201 | 107042 | 9548295 | 851787199
| | | | | | 41 | 8404 | 1749965 | 364637102
| | | | | | | 122 | 58825
| | | | | | | | 365
| | | | | | | |
|
|