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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 12 |
| 3 | 135 |
| 4 | 1792 |
| 5 | 34375 |
| 6 | 606528 |
| 7 | 14000231 |
| 8 | 318767104 |
| 9 | 8910671247 |
| 10 | 290000000000 |
| 11 | 8844661788941 |
| 12 | 329895716585472 |
| 13 | 12417879370282373 |
| 14 | 477816293498994688 |
| 15 | 20581012847900390625 |
| 16 | 977677435906606235648 |
| 17 | 48807175451293869086443 |
| 18 | 2400130892593088792100864 |
[2,12,135,1792,34375,606528,14000231,318767104, 8910671247,290000000000,8844661788941, 329895716585472,12417879370282373, 477816293498994688,20581012847900390625, 977677435906606235648,48807175451293869086443, 2400130892593088792100864] |