A156587 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 1 | | 5 | | 1 |
| | | | | | | 1 | | 30 | | 30 | | 1 |
| | | | | | 1 | | 210 | | 1260 | | 210 | | 1 |
| | | | | 1 | | 1680 | | 70560 | | 70560 | | 1680 | | 1 |
| | | | 1 | | 15120 | | 5080320 | | 35562240 | | 5080320 | | 15120 | | 1 |
| | | 1 | | 151200 | | 457228800 | | 25604812800 | | 25604812800 | | 457228800 | | 151200 | | 1 |
| | 1 | | 1663200 | | 50295168000 | | 25348764672000 |
|
A156587 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 5 | 30 | 210 | 1680 | 15120 | 151200 | 1663200
| | 1 | 30 | 1260 | 70560 | 5080320 | 457228800 | 50295168000
| | 1 | 210 | 70560 | 35562240 | 25604812800 | 25348764672000
| | 1 | 1680 | 5080320 | 25604812800
| | 1 | 15120 | 457228800
| | 1 | 151200
| | 1
|
A156587 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 5 | 30 | 210 | 1680 | 15120 | 151200 | 1663200
| | | 1 | 30 | 1260 | 70560 | 5080320 | 457228800 | 50295168000
| | | | 1 | 210 | 70560 | 35562240 | 25604812800 | 25348764672000
| | | | | 1 | 1680 | 5080320 | 25604812800
| | | | | | 1 | 15120 | 457228800
| | | | | | | 1 | 151200
| | | | | | | | 1
| | | | | | | |
|
|
