A172373 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | 1 | | 6 | | 6 | | 1 |
| | | | | | | 1 | | 15 | | 45 | | 15 | | 1 |
| | | | | | 1 | | 40 | | 300 | | 300 | | 40 | | 1 |
| | | | | 1 | | 104 | | 2080 | | 5200 | | 2080 | | 104 | | 1 |
| | | | 1 | | 273 | | 14196 | | 94640 | | 94640 | | 14196 | | 273 | | 1 |
| | | 1 | | 714 | | 97461 | | 1689324 | | 4504864 | | 1689324 | | 97461 | | 714 | | 1 |
| | 1 | | 1870 | | 667590 | | 30375345 | | 210602392 | | 210602392 | | 30375345 | | 667590 | | 1870 | | 1 |
|
A172373 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 6 | 15 | 40 | 104 | 273 | 714 | 1870
| | 1 | 6 | 45 | 300 | 2080 | 14196 | 97461 | 667590
| | 1 | 15 | 300 | 5200 | 94640 | 1689324 | 30375345
| | 1 | 40 | 2080 | 94640 | 4504864 | 210602392
| | 1 | 104 | 14196 | 1689324 | 210602392
| | 1 | 273 | 97461 | 30375345
| | 1 | 714 | 667590
| | 1 | 1870
| | 1
|
A172373 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 6 | 15 | 40 | 104 | 273 | 714 | 1870
| | | 1 | 6 | 45 | 300 | 2080 | 14196 | 97461 | 667590
| | | | 1 | 15 | 300 | 5200 | 94640 | 1689324 | 30375345
| | | | | 1 | 40 | 2080 | 94640 | 4504864 | 210602392
| | | | | | 1 | 104 | 14196 | 1689324 | 210602392
| | | | | | | 1 | 273 | 97461 | 30375345
| | | | | | | | 1 | 714 | 667590
| | | | | | | | | 1 | 1870
| | | | | | | | | | 1
|
|
