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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 225 |
| 3 | 5625 |
| 4 | 140625 |
| 5 | 3515625 |
| 6 | 87890625 |
| 7 | 2197265625 |
| 8 | 54931640625 |
| 9 | 1373291015625 |
| 10 | 34332275390625 |
| 11 | 858306884765625 |
| 12 | 21457672119140625 |
| 13 | 536441802978515625 |
| 14 | 13411045074462890625 |
| 15 | 335276126861572265625 |
| 16 | 8381903171539306640625 |
| 17 | 209547579288482666015625 |
| 18 | 5238689482212066650390625 |
[1,9,225,5625,140625,3515625,87890625,2197265625, 54931640625,1373291015625,34332275390625, 858306884765625,21457672119140625, 536441802978515625,13411045074462890625, 335276126861572265625,8381903171539306640625, 209547579288482666015625, 5238689482212066650390625] |