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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 64 |
| 4 | 968 |
| 5 | 16384 |
| 6 | 632168 |
| 7 | 45430846 |
| 8 | 5853525133 |
| 9 | 1301439097025 |
[1,2,8,64,968,16384,632168,45430846,5853525133, 1301439097025] |