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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 8 |
| 4 | 128 |
| 5 | 31104 |
| 6 | 127401984 |
| 7 | 9953280000000 |
| 8 | 16717688340480000000 |
| 9 | 2243810146471316029440000000 |
| 10 | 22438101464713160294400000000000000000 |
| 11 | 16671697210628551555613518410547200000000000000000 |
| 12 | 2163091659500402360172559530668851200000000000000000000000000000 |
[1,1,1,8,128,31104,127401984,9953280000000, 16717688340480000000,2243810146471316029440000000, 22438101464713160294400000000000000000, 16671697210628551555613518410547200000000000000000\ , 21630916595004023601725595306688512000000000000000\ 00000000000000] |