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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 16 |
| 3 | 256 |
| 4 | 15982 |
| 5 | 3082378 |
| 6 | 1476568000 |
| 7 | 2280441045555 |
| 8 | 10599616558936358 |
| 9 | 140380164790852384033 |
[1,2,16,256,15982,3082378,1476568000, 2280441045555,10599616558936358, 140380164790852384033] |