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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 387420489 |
| 2 | 913517247483640899 |
| 3 | 991035916125874083964008999 |
| 4 | 999100359916012598740083996400089999 |
| 5 | 999910003599916001259987400083999640000899999 |
| 6 | 999991000035999916000125999874000083999964000008999999 |
[0,387420489,913517247483640899, 991035916125874083964008999, 999100359916012598740083996400089999, 999910003599916001259987400083999640000899999, 99999100003599991600012599987400008399996400000899\ 9999] |