| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 18 |
| 2 | 81 |
| 3 | 2916 |
| 4 | 6561 |
| 5 | 118098 |
| 6 | 531441 |
| 7 | 38263752 |
| 8 | 43046721 |
| 9 | 774840978 |
| 10 | 3486784401 |
| 11 | 125524238436 |
| 12 | 282429536481 |
| 13 | 5083731656658 |
| 14 | 22876792454961 |
| 15 | 3294258113514384 |
| 16 | 1853020188851841 |
| 17 | 33354363399333138 |
| 18 | 150094635296999121 |
[1,18,81,2916,6561,118098,531441,38263752, 43046721,774840978,3486784401,125524238436, 282429536481,5083731656658,22876792454961, 3294258113514384,1853020188851841, 33354363399333138,150094635296999121] |