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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 550 |
| 3 | 4489 |
| 4 | 43983 |
| 5 | 417316 |
| 6 | 3844551 |
| 7 | 35366809 |
| 8 | 328433132 |
| 9 | 3052452001 |
| 10 | 28290095075 |
| 11 | 262170624676 |
| 12 | 2431326125085 |
| 13 | 22547805893209 |
| 14 | 209069115157116 |
| 15 | 1938539544264801 |
| 16 | 17975390997067603 |
| 17 | 166679573715753604 |
[81,550,4489,43983,417316,3844551,35366809, 328433132,3052452001,28290095075,262170624676, 2431326125085,22547805893209,209069115157116, 1938539544264801,17975390997067603, 166679573715753604] |