A173884 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 1 | | 3 | | 1 |
| | | | | | | 1 | | 21 | | 21 | | 1 |
| | | | | | 1 | | 105 | | 735 | | 105 | | 1 |
| | | | | 1 | | 465 | | 16275 | | 16275 | | 465 | | 1 |
| | | | 1 | | 1953 | | 302715 | | 1513575 | | 302715 | | 1953 | | 1 |
| | | 1 | | 8001 | | 5208651 | | 115334415 | | 115334415 | | 5208651 | | 8001 | | 1 |
| | 1 | | 32385 | | 86370795 | | 8032483935 | | 35572428855 | | 8032483935 |
|
A173884 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 21 | 105 | 465 | 1953 | 8001 | 32385
| | 1 | 21 | 735 | 16275 | 302715 | 5208651 | 86370795
| | 1 | 105 | 16275 | 1513575 | 115334415 | 8032483935
| | 1 | 465 | 302715 | 115334415 | 35572428855
| | 1 | 1953 | 5208651 | 8032483935
| | 1 | 8001
| | 1
|
A173884 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 21 | 105 | 465 | 1953 | 8001 | 32385
| | | 1 | 21 | 735 | 16275 | 302715 | 5208651 | 86370795
| | | | 1 | 105 | 16275 | 1513575 | 115334415 | 8032483935
| | | | | 1 | 465 | 302715 | 115334415 | 35572428855
| | | | | | 1 | 1953 | 5208651 | 8032483935
| | | | | | | 1 | 8001
| | | | | | | | 1
| | | | | | | |
|
|
