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| n | a(n) |
|---|---|
| 10 | 362880 |
| 11 | 18144000 |
| 12 | 515592000 |
| 13 | 10977120000 |
| 14 | 195113318400 |
| 15 | 3063348288000 |
| 16 | 43943631732000 |
| 17 | 588790762560000 |
| 18 | 7481812222684800 |
| 19 | 91158709273632000 |
| 20 | 1073686615986821760 |
| 21 | 12301136459932320000 |
| 22 | 137753173599205449600 |
| 23 | 1513588462073525376000 |
| 24 | 16368017165881385004000 |
[362880,18144000,515592000,10977120000, 195113318400,3063348288000,43943631732000, 588790762560000,7481812222684800, 91158709273632000,1073686615986821760, 12301136459932320000,137753173599205449600, 1513588462073525376000,16368017165881385004000] |