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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 18 |
| 2 | 27 |
| 3 | 324 |
| 4 | 405 |
| 5 | 4374 |
| 6 | 5103 |
| 7 | 52488 |
| 8 | 59049 |
| 9 | 590490 |
| 10 | 649539 |
| 11 | 6377292 |
| 12 | 6908733 |
| 13 | 66961566 |
| 14 | 71744535 |
| 15 | 688747536 |
| 16 | 731794257 |
| 17 | 6973568802 |
| 18 | 7360989291 |
| 19 | 69735688020 |
| 20 | 73222472421 |
| 21 | 690383311398 |
| 22 | 721764371007 |
| 23 | 6778308875544 |
[1,18,27,324,405,4374,5103,52488,59049,590490, 649539,6377292,6908733,66961566,71744535, 688747536,731794257,6973568802,7360989291, 69735688020,73222472421,690383311398,721764371007, 6778308875544] |