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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 4021 |
| 3 | 273205 |
| 4 | 18403423 |
| 5 | 1240971177 |
| 6 | 83670667271 |
| 7 | 5641457245533 |
| 8 | 380372051615157 |
| 9 | 25646375739266275 |
| 10 | 1729192685453990877 |
| 11 | 116589859961103508219 |
| 12 | 7861006788319434001589 |
| 13 | 530024032549172830292655 |
[64,4021,273205,18403423,1240971177,83670667271, 5641457245533,380372051615157,25646375739266275, 1729192685453990877,116589859961103508219, 7861006788319434001589,530024032549172830292655] |