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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 39 |
| 3 | 625 |
| 4 | 10008 |
| 5 | 160130 |
| 6 | 2562088 |
| 7 | 40993409 |
| 8 | 655894552 |
| 9 | 10494312834 |
| 10 | 167909005352 |
| 11 | 2686544085636 |
| 12 | 42984705370181 |
| 13 | 687755285922905 |
| 14 | 11004084574766480 |
| 15 | 176065353196263684 |
| 16 | 2817045651140218949 |
| 17 | 45072730418243503186 |
| 18 | 721163686691896050979 |
[2,39,625,10008,160130,2562088,40993409,655894552, 10494312834,167909005352,2686544085636, 42984705370181,687755285922905,11004084574766480, 176065353196263684,2817045651140218949, 45072730418243503186,721163686691896050979] |