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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 1089 |
| 4 | 73441 |
| 5 | 100280196 |
| 6 | 1977847729 |
| 7 | 4146497327025 |
| 8 | 4187530604721424 |
| 9 | 121439588246116522561 |
[1,9,1089,73441,100280196,1977847729, 4146497327025,4187530604721424, 121439588246116522561] |