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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 39 |
| 4 | 1899 |
| 5 | 526941 |
| 6 | 553836104 |
| 7 | 2209503331909 |
| 8 | 33131995796175560 |
| 9 | 1855564362850749460006 |
| 10 | 386500467555938135363021737 |
[2,5,39,1899,526941,553836104,2209503331909, 33131995796175560,1855564362850749460006, 386500467555938135363021737] |