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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 729 |
| 3 | 729316 |
| 4 | 7293164743396 |
| 5 | 72931647433968832639882896 |
| 6 | 72931647433968832639882896319584064899663299793041401 |
[7,729,729316,7293164743396, 72931647433968832639882896, 72931647433968832639882896319584064899663299793041\ 401] |