A157398 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 4 |
| | | | | | | | 1 | | 12 | | 28 |
| | | | | | | 1 | | 72 | | 112 | | 280 |
| | | | | | 1 | | 280 | | 1400 | | 1400 | | 3640 |
| | | | | 1 | | 1740 | | 15120 | | 21000 | | 21840 | | 58240 |
| | | | 1 | | 8484 | | 126420 | | 401800 | | 382200 | | 407680 | | 1106560 |
| | | 1 | | 57232 | | 1538208 | | 6370000 | | 8357440 | | 8153600 | | 8852480 | | 24344320 |
| | 1 |
|
A157398 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 4 | 12 | 72 | 280 | 1740 | 8484 | 57232
| | 28 | 112 | 1400 | 15120 | 126420 | 1538208
| | 280 | 1400 | 21000 | 401800 | 6370000
| | 3640 | 21840 | 382200 | 8357440
| | 58240 | 407680 | 8153600
| | 1106560 | 8852480
| | 24344320
|
A157398 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 4 | 12 | 72 | 280 | 1740 | 8484 | 57232
| | | 28 | 112 | 1400 | 15120 | 126420 | 1538208
| | | | 280 | 1400 | 21000 | 401800 | 6370000
| | | | | 3640 | 21840 | 382200 | 8357440
| | | | | | 58240 | 407680 | 8153600
| | | | | | | 1106560 | 8852480
| | | | | | | | 24344320
| | | | | | | |
|
|
