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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 5 |
| 2 | 18 |
| 3 | 17 |
| 4 | 1600 |
| 5 | 984 |
| 6 | 2888 |
| 7 | 460747 |
| 8 | 99271723 |
| 9 | 792174 |
| 10 | 32917926 |
[2,5,18,17,1600,984,2888,460747,99271723,792174, 32917926] |