| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 729 |
| 4 | 6387 |
| 5 | 55887 |
| 6 | 488037 |
| 7 | 4259277 |
| 8 | 37155951 |
| 9 | 324050745 |
| 10 | 2825717151 |
| 11 | 24637772289 |
| 12 | 214806377331 |
| 13 | 1872733313427 |
| 14 | 16326535353843 |
| 15 | 142332941107035 |
| 16 | 1240830892976931 |
| 17 | 10817256322467417 |
| 18 | 94301798866919901 |
| 19 | 822094581839055501 |
[9,81,729,6387,55887,488037,4259277,37155951, 324050745,2825717151,24637772289,214806377331, 1872733313427,16326535353843,142332941107035, 1240830892976931,10817256322467417, 94301798866919901,822094581839055501] |