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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 13 |
| 3 | 31 |
| 4 | 55987 |
| 5 | 12207031 |
| 6 | 16148168401 |
| 7 | 50544702849929377 |
| 8 | 109912203092239643840221 |
| 9 | 11111111111111111111111 |
| 10 | 7369130657357778596659 |
| 11 | 568972471024107865287021434301977158534824481 |
| 12 | 388230138454493 |
[3,13,31,55987,12207031,16148168401, 50544702849929377,109912203092239643840221, 11111111111111111111111,7369130657357778596659, 568972471024107865287021434301977158534824481, 388230138454493] |