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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 10 |
| 6 | 17 |
| 7 | 688 |
| 8 | 1075 |
| 9 | 103681 |
| 10 | 7860997 |
| 11 | 10749957121 |
| 12 | 115561578124838522881 |
| 13 | 488296733939737583689 |
| 14 | 489501979450313254561 |
| 15 | 3628116960730713370000 |
| 16 | 8784132317383836036997 |
| 17 | 8784200214538920269317 |
| 18 | 50755107290462736080376601 |
| 19 | 94426187701102977738552612783157 |
[1,2,3,4,10,17,688,1075,103681,7860997, 10749957121,115561578124838522881, 488296733939737583689,489501979450313254561, 3628116960730713370000,8784132317383836036997, 8784200214538920269317,50755107290462736080376601, 94426187701102977738552612783157] |