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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 64 |
| 4 | 729 |
| 5 | 9261 |
| 6 | 132651 |
| 7 | 2048383 |
| 8 | 33698267 |
| 9 | 582182875 |
| 10 | 10474708672 |
| 11 | 194910229592 |
| 12 | 3731808877831 |
| 13 | 73218245857875 |
| 14 | 1467320155924104 |
| 15 | 29956212068269248 |
| 16 | 621670415400598563 |
| 17 | 13090510375656917139 |
| 18 | 279262277830549534968 |
| 19 | 6027856524470650538304 |
[1,1,8,64,729,9261,132651,2048383,33698267, 582182875,10474708672,194910229592,3731808877831, 73218245857875,1467320155924104,29956212068269248, 621670415400598563,13090510375656917139, 279262277830549534968,6027856524470650538304] |