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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 125 |
| 5 | 1291 |
| 6 | 16177 |
| 7 | 241207 |
| 8 | 4153193 |
| 9 | 81082225 |
| 10 | 1770989921 |
| 11 | 42763506919 |
| 12 | 1131353484637 |
| 13 | 32541516492811 |
| 14 | 1011058416700529 |
| 15 | 33745374949198231 |
| 16 | 1204107124715441873 |
| 17 | 45741398365345761073 |
| 18 | 1843069565594762478145 |
| 19 | 78511973999963036415967 |
| 20 | 3525468554804288803649381 |
[1,1,3,16,125,1291,16177,241207,4153193,81082225, 1770989921,42763506919,1131353484637, 32541516492811,1011058416700529,33745374949198231, 1204107124715441873,45741398365345761073, 1843069565594762478145,78511973999963036415967, 3525468554804288803649381] |