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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 48 |
| 9 | 1431 |
| 10 | 34220 |
| 11 | 720720 |
| 12 | 13991544 |
| 13 | 256851595 |
| 14 | 4529365776 |
| 15 | 77515521435 |
| 16 | 1296543270880 |
| 17 | 21300860967540 |
| 18 | 344985116783580 |
| 19 | 5523060198105996 |
| 20 | 87586833265107120 |
| 21 | 1378095785451705375 |
| 22 | 21540468229578953600 |
[1,48,1431,34220,720720,13991544,256851595, 4529365776,77515521435,1296543270880, 21300860967540,344985116783580,5523060198105996, 87586833265107120,1378095785451705375, 21540468229578953600] |