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| n | a(n) |
|---|---|
| 10 | 151200 |
| 11 | 18794160 |
| 12 | 1524489120 |
| 13 | 104403293280 |
| 14 | 6629862919680 |
| 15 | 408263722546680 |
| 16 | 24979292241583680 |
| 17 | 1540245109352826240 |
| 18 | 96546169418188875840 |
| 19 | 6185447845988110316640 |
| 20 | 406427517408935067292800 |
| 21 | 27447169190924624967665280 |
| 22 | 1907535125221297935659493120 |
[151200,18794160,1524489120,104403293280, 6629862919680,408263722546680,24979292241583680, 1540245109352826240,96546169418188875840, 6185447845988110316640,406427517408935067292800, 27447169190924624967665280, 1907535125221297935659493120] |