A156586 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 1 | | 4 | | 1 |
| | | | | | | 1 | | 20 | | 20 | | 1 |
| | | | | | 1 | | 120 | | 600 | | 120 | | 1 |
| | | | | 1 | | 840 | | 25200 | | 25200 | | 840 | | 1 |
| | | | 1 | | 6720 | | 1411200 | | 8467200 | | 1411200 | | 6720 | | 1 |
| | | 1 | | 60480 | | 101606400 | | 4267468800 | | 4267468800 | | 101606400 | | 60480 | | 1 |
| | 1 | | 604800 | | 9144576000 | | 3072577536000 | | 21508042752000 |
|
A156586 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 4 | 20 | 120 | 840 | 6720 | 60480 | 604800
| | 1 | 20 | 600 | 25200 | 1411200 | 101606400 | 9144576000
| | 1 | 120 | 25200 | 8467200 | 4267468800 | 3072577536000
| | 1 | 840 | 1411200 | 4267468800 | 21508042752000
| | 1 | 6720 | 101606400
| | 1 | 60480
| | 1
|
A156586 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 4 | 20 | 120 | 840 | 6720 | 60480 | 604800
| | | 1 | 20 | 600 | 25200 | 1411200 | 101606400 | 9144576000
| | | | 1 | 120 | 25200 | 8467200 | 4267468800 | 3072577536000
| | | | | 1 | 840 | 1411200 | 4267468800 | 21508042752000
| | | | | | 1 | 6720 | 101606400
| | | | | | | 1 | 60480
| | | | | | | | 1
| | | | | | | |
|
|
