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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 27 |
| 4 | 144 |
| 5 | 1331 |
| 6 | 27000 |
| 7 | 569344 |
| 8 | 16777216 |
| 9 | 1083206683 |
| 10 | 85307250648 |
| 11 | 9197641041408 |
| 12 | 1896999488202671 |
| 13 | 567844742926891708 |
[2,8,27,144,1331,27000,569344,16777216,1083206683, 85307250648,9197641041408,1896999488202671, 567844742926891708] |