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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 58 |
| 4 | 636 |
| 5 | 6145 |
| 6 | 62635 |
| 7 | 625051 |
| 8 | 6247313 |
| 9 | 62502484 |
| 10 | 625013004 |
| 11 | 6250055104 |
| 12 | 62499937801 |
[1,4,58,636,6145,62635,625051,6247313,62502484, 625013004,6250055104,62499937801] |