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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 65 |
| 5 | 1871 |
| 6 | 69885 |
| 7 | 3466339 |
| 8 | 222981385 |
| 9 | 18102473271 |
| 10 | 1811907033269 |
| 11 | 219290184518315 |
| 12 | 31573338878091585 |
| 13 | 5334099790769759551 |
| 14 | 1045025926871985755053 |
| 15 | 235016617680587793977331 |
| 16 | 60133997212733124023350265 |
| 17 | 17369999617568255471165082311 |
[1,1,1,3,65,1871,69885,3466339,222981385, 18102473271,1811907033269,219290184518315, 31573338878091585,5334099790769759551, 1045025926871985755053,235016617680587793977331, 60133997212733124023350265, 17369999617568255471165082311] |