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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 625 |
| 4 | 4761 |
| 5 | 36481 |
| 6 | 279841 |
| 7 | 2146225 |
| 8 | 16459249 |
| 9 | 126225225 |
| 10 | 968018769 |
| 11 | 7423717921 |
| 12 | 56932346025 |
| 13 | 436613028289 |
| 14 | 3348376640449 |
| 15 | 25678633973281 |
| 16 | 196928934060769 |
| 17 | 1510244084935881 |
| 18 | 11582031898782801 |
| 19 | 88822372650180625 |
[9,81,625,4761,36481,279841,2146225,16459249, 126225225,968018769,7423717921,56932346025, 436613028289,3348376640449,25678633973281, 196928934060769,1510244084935881, 11582031898782801,88822372650180625] |