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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 15 |
| 4 | 229 |
| 5 | 5298 |
| 6 | 177661 |
| 7 | 8605831 |
| 8 | 601894158 |
| 9 | 60571434501 |
| 10 | 8716575772821 |
| 11 | 1780241773757704 |
| 12 | 511992638746006383 |
| 13 | 205785031866223973343 |
| 14 | 114780183140747719353332 |
| 15 | 88271680420025831479693219 |
| 16 | 93054995762621287409298093049 |
[1,2,15,229,5298,177661,8605831,601894158, 60571434501,8716575772821,1780241773757704, 511992638746006383,205785031866223973343, 114780183140747719353332, 88271680420025831479693219, 93054995762621287409298093049] |