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| n | a(n) |
|---|---|
| 1 | 57 |
| 2 | 637 |
| 3 | 8988 |
| 4 | 133532 |
| 5 | 1604460 |
| 6 | 16272765 |
| 7 | 146502363 |
| 8 | 1233883972 |
| 9 | 9794613332 |
| 10 | 73409666932 |
[57,637,8988,133532,1604460,16272765,146502363, 1233883972,9794613332,73409666932] |