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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 13 |
| 4 | 101 |
| 5 | 2014 |
| 6 | 61467 |
| 7 | 18643274 |
| 8 | 12581159370 |
| 9 | 17019760656259 |
[1,5,13,101,2014,61467,18643274,12581159370, 17019760656259] |