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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 17 |
| 3 | 4305 |
| 4 | 17685969 |
| 5 | 1158222948817 |
| 6 | 1214707441621563857 |
| 7 | 20378476519005090654009809 |
| 8 | 5470368244500158631765129973873105 |
| 9 | 23494985488623606981701685225398976313178577 |
[1,1,17,4305,17685969,1158222948817, 1214707441621563857,20378476519005090654009809, 5470368244500158631765129973873105, 23494985488623606981701685225398976313178577] |