A187783 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 1 | | 1 | | 1 |
| | | | | | | 1 | | 1 | | 2 | | 1 |
| | | | | | 1 | | 1 | | 6 | | 6 | | 1 |
| | | | | 1 | | 1 | | 20 | | 90 | | 24 | | 1 |
| | | | 1 | | 1 | | 70 | | 1680 | | 2520 | | 120 | | 1 |
| | | 1 | | 1 | | 252 | | 34650 | | 369600 | | 113400 | | 720 | | 1 |
| | 1 | | 1 | | 924 | | 756756 | | 63063000 | | 168168000 | | 7484400 | | 5040 | | 1 |
|
A187783 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 6 | 20 | 70 | 252 | 924
| 1 | 6 | 90 | 1680 | 34650 | 756756
| 1 | 24 | 2520 | 369600 | 63063000
| 1 | 120 | 113400 | 168168000
| 1 | 720 | 7484400
| 1 | 5040
| 1
|
A187783 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 2 | 6 | 20 | 70 | 252 | 924
| | | | 1 | 6 | 90 | 1680 | 34650 | 756756
| | | | | 1 | 24 | 2520 | 369600 | 63063000
| | | | | | 1 | 120 | 113400 | 168168000
| | | | | | | 1 | 720 | 7484400
| | | | | | | | 1 | 5040
| | | | | | | | | 1
|
|