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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 193 |
| 4 | 6673 |
| 5 | 319521 |
| 6 | 19575001 |
| 7 | 1461908449 |
| 8 | 128828471073 |
| 9 | 13086232224193 |
| 10 | 1505486837413801 |
| 11 | 193477959856396161 |
| 12 | 27472294970916814129 |
| 13 | 4271180551913140331233 |
| 14 | 721640087945607030774393 |
| 15 | 131656978622706616938932641 |
| 16 | 25795404137789777215960879681 |
| 17 | 5402020596794976601680149234049 |
[1,1,9,193,6673,319521,19575001,1461908449, 128828471073,13086232224193,1505486837413801, 193477959856396161,27472294970916814129, 4271180551913140331233,721640087945607030774393, 131656978622706616938932641, 25795404137789777215960879681, 5402020596794976601680149234049] |