A257493 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | 1 | | 1 | | 2 | | 1 |
| | | | | | | | 1 | | 1 | | 3 | | 6 | | 1 |
| | | | | | | 1 | | 1 | | 4 | | 21 | | 24 | | 1 |
| | | | | | 1 | | 1 | | 5 | | 55 | | 282 | | 120 | | 1 |
| | | | | 1 | | 1 | | 6 | | 120 | | 2008 | | 6210 | | 720 | | 1 |
| | | | 1 | | 1 | | 7 | | 231 | | 10147 | | 153040 | | 202410 | | 5040 | | 1 |
| | | 1 | | 1 | | 8 | | 406 | | 40176 | | 2224955 | | 20933840 | | 9135630 | | 40320 | | 1 |
| | 1 | | 1 | | 9 | | 666 | | 132724 | | 22069251 | | 1047649905 | | 4662857360 | | 545007960 | | 362880 | | 1 |
|
A257493 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | 1 | 6 | 21 | 55 | 120 | 231 | 406 | 666
| | 1 | 24 | 282 | 2008 | 10147 | 40176 | 132724
| | 1 | 120 | 6210 | 153040 | 2224955 | 22069251
| | 1 | 720 | 202410 | 20933840 | 1047649905
| | 1 | 5040 | 9135630 | 4662857360
| | 1 | 40320 | 545007960
| | 1 | 362880
| | 1
|
A257493 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | | | 1 | 6 | 21 | 55 | 120 | 231 | 406 | 666
| | | | | 1 | 24 | 282 | 2008 | 10147 | 40176 | 132724
| | | | | | 1 | 120 | 6210 | 153040 | 2224955 | 22069251
| | | | | | | 1 | 720 | 202410 | 20933840 | 1047649905
| | | | | | | | 1 | 5040 | 9135630 | 4662857360
| | | | | | | | | 1 | 40320 | 545007960
| | | | | | | | | | 1 | 362880
| | | | | | | | | | | 1
|
|
