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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 23 |
| 8 | 106 |
| 9 | 891 |
| 10 | 94289 |
| 11 | 46062265 |
| 12 | 344980727309 |
| 13 | 3442224480935856594 |
| 14 | 77458438596193694601268422031 |
| 15 | 200130424073190804359006946314196714242380417 |
| 16 | 6873796333354760314538446350412794888765818679762438117097006307173727 |
[1,1,1,1,2,3,5,23,106,891,94289,46062265, 344980727309,3442224480935856594, 77458438596193694601268422031, 200130424073190804359006946314196714242380417, 68737963333547603145384463504127948887658186797624\ 38117097006307173727] |