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| n | a(n) |
|---|---|
| 1 | 25200 |
| 2 | 982800 |
| 3 | 1562400 |
| 4 | 5358990 |
| 5 | 6854400 |
| 6 | 60933600 |
| 7 | 267321600 |
| 8 | 450964684800 |
| 9 | 798939187200 |
| 10 | 17587622707200 |
| 11 | 31158628300800 |
| 12 | 118216784402841600 |
| 13 | 459775632811622400 |
| 14 | 1936908127288531353600 |
| 15 | 75539416964252722790400 |
[25200,982800,1562400,5358990,6854400,60933600, 267321600,450964684800,798939187200, 17587622707200,31158628300800,118216784402841600, 459775632811622400,1936908127288531353600, 75539416964252722790400] |