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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 58 |
| 3 | 625 |
| 4 | 7198 |
| 5 | 90045 |
| 6 | 1171813 |
| 7 | 15798521 |
| 8 | 218322975 |
| 9 | 3078005599 |
| 10 | 44090886228 |
| 11 | 639937519413 |
[7,58,625,7198,90045,1171813,15798521,218322975, 3078005599,44090886228,639937519413] |