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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 24 |
| 4 | 1728 |
| 5 | 1658880 |
| 6 | 17915904000 |
| 7 | 4334215495680000 |
| 8 | 18349334722510848000000 |
| 9 | 2556904928296218824540160000000 |
| 10 | 8768179290592246332614309314560000000000 |
| 11 | 1343991010969776301093243630262125854720000000000000 |
[1,1,2,24,1728,1658880,17915904000, 4334215495680000,18349334722510848000000, 2556904928296218824540160000000, 8768179290592246332614309314560000000000, 13439910109697763010932436302621258547200000000000\ 00] |