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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 27 |
| 3 | 125 |
| 4 | 512 |
| 5 | 1331 |
| 6 | 3375 |
| 7 | 753571 |
| 8 | 2571353 |
| 9 | 5177717 |
| 10 | 17173512 |
| 11 | 25153757 |
| 12 | 72511713 |
| 13 | 11512557512 |
| 14 | 22211737731 |
| 15 | 27135225125 |
| 16 | 125375375125 |
| 17 | 552377215125 |
| 18 | 2252212155712 |
| 19 | 3531251132352 |
| 20 | 7127771131125 |
| 21 | 23771111713777 |
| 22 | 31122112521375 |
| 23 | 37521355131352 |
| 24 | 125112533753375 |
[1,27,125,512,1331,3375,753571,2571353,5177717, 17173512,25153757,72511713,11512557512, 22211737731,27135225125,125375375125,552377215125, 2252212155712,3531251132352,7127771131125, 23771111713777,31122112521375,37521355131352, 125112533753375] |