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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 69 |
| 3 | 633 |
| 4 | 7799 |
| 5 | 91425 |
| 6 | 983981 |
| 7 | 9526987 |
| 8 | 82847704 |
| 9 | 652848538 |
| 10 | 4712696751 |
| 11 | 31480011434 |
| 12 | 196280028176 |
| 13 | 1150650039753 |
| 14 | 6380377582098 |
| 15 | 33631853768986 |
| 16 | 169225758487160 |
| 17 | 815686475352515 |
| 18 | 3777731764480697 |
| 19 | 16854911299206527 |
[6,69,633,7799,91425,983981,9526987,82847704, 652848538,4712696751,31480011434,196280028176, 1150650039753,6380377582098,33631853768986, 169225758487160,815686475352515,3777731764480697, 16854911299206527] |