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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 53 |
| 4 | 585 |
| 5 | 6274 |
| 6 | 62515 |
| 7 | 625369 |
| 8 | 6251231 |
| 9 | 62504587 |
| 10 | 625010556 |
| 11 | 6249958503 |
| 12 | 62499878794 |
[0,4,53,585,6274,62515,625369,6251231,62504587, 625010556,6249958503,62499878794] |