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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 16 |
| 5 | 164 |
| 6 | 3341 |
| 7 | 138101 |
| 8 | 11578037 |
| 9 | 1961162564 |
| 10 | 668678055847 |
| 11 | 457751797355605 |
| 12 | 628137837068751147 |
| 13 | 1726130748679532455689 |
| 14 | 9493834992383031007906911 |
| 15 | 104476428350838383854529661007 |
| 16 | 2299979227717819421763629684068904 |
[1,1,3,16,164,3341,138101,11578037,1961162564, 668678055847,457751797355605,628137837068751147, 1726130748679532455689,9493834992383031007906911, 104476428350838383854529661007, 2299979227717819421763629684068904] |