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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1791 |
| 3 | 87918 |
| 4 | 14150391 |
| 5 | 6011669886 |
| 6 | 6566654061039 |
| 7 | 18225426305218983 |
| 8 | 128865421969802643036 |
| 9 | 2315569396435124102371935 |
[81,1791,87918,14150391,6011669886,6566654061039, 18225426305218983,128865421969802643036, 2315569396435124102371935] |