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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 394 |
| 3 | 122601 |
| 4 | 8510140 |
| 5 | 210940745 |
| 6 | 2524556538 |
| 7 | 17167621086 |
| 8 | 72787256640 |
| 9 | 202996629360 |
| 10 | 382918536000 |
| 11 | 492133561920 |
| 12 | 424994169600 |
| 13 | 236107872000 |
| 14 | 76281004800 |
| 15 | 10897286400 |
[1,394,122601,8510140,210940745,2524556538, 17167621086,72787256640,202996629360,382918536000, 492133561920,424994169600,236107872000, 76281004800,10897286400] |