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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 549 |
| 3 | 549 |
| 4 | 3399 |
| 5 | 7737 |
| 6 | 3399 |
| 7 | 19797 |
| 8 | 93405 |
| 9 | 93405 |
| 10 | 19797 |
| 11 | 111495 |
| 12 | 1020756 |
| 13 | 2105607 |
| 14 | 1020756 |
| 15 | 111495 |
| 16 | 614367 |
| 17 | 10505604 |
| 18 | 41873838 |
| 19 | 41873838 |
| 20 | 10505604 |
| 21 | 614367 |
| 22 | 3337695 |
| 23 | 103812645 |
| 24 | 769739571 |
| 25 | 1483188648 |
| 26 | 769739571 |
| 27 | 103812645 |
[81,549,549,3399,7737,3399,19797,93405,93405, 19797,111495,1020756,2105607,1020756,111495, 614367,10505604,41873838,41873838,10505604,614367, 3337695,103812645,769739571,1483188648,769739571, 103812645] |