A008517 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 2 |
| | | | | | | | 1 | | 8 | | 6 |
| | | | | | | 1 | | 22 | | 58 | | 24 |
| | | | | | 1 | | 52 | | 328 | | 444 | | 120 |
| | | | | 1 | | 114 | | 1452 | | 4400 | | 3708 | | 720 |
| | | | 1 | | 240 | | 5610 | | 32120 | | 58140 | | 33984 | | 5040 |
| | | 1 | | 494 | | 19950 | | 195800 | | 644020 | | 785304 | | 341136 | | 40320 |
| | 1 | | 1004 | | 67260 | | 1062500 | | 5765500 | | 12440064 | | 11026296 | | 3733920 | | 362880 |
|
A008517 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 2 | 8 | 22 | 52 | 114 | 240 | 494 | 1004
| 6 | 58 | 328 | 1452 | 5610 | 19950 | 67260
| 24 | 444 | 4400 | 32120 | 195800 | 1062500
| 120 | 3708 | 58140 | 644020 | 5765500
| 720 | 33984 | 785304 | 12440064
| 5040 | 341136 | 11026296
| 40320 | 3733920
| 362880
|
A008517 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 2 | 8 | 22 | 52 | 114 | 240 | 494 | 1004
| | | 6 | 58 | 328 | 1452 | 5610 | 19950 | 67260
| | | | 24 | 444 | 4400 | 32120 | 195800 | 1062500
| | | | | 120 | 3708 | 58140 | 644020 | 5765500
| | | | | | 720 | 33984 | 785304 | 12440064
| | | | | | | 5040 | 341136 | 11026296
| | | | | | | | 40320 | 3733920
| | | | | | | | | 362880
|
|