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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 17 |
| 4 | 125 |
| 5 | 1055 |
| 6 | 9755 |
| 7 | 96353 |
| 8 | 1000529 |
| 9 | 10805045 |
| 10 | 120429581 |
| 11 | 1377565711 |
| 12 | 16103628975 |
| 13 | 191753782563 |
| 14 | 2319792221739 |
| 15 | 28453553549889 |
| 16 | 353240252092329 |
| 17 | 4432432002187105 |
| 18 | 56149270333672577 |
| 19 | 717376886229388757 |
| 20 | 9236054560816552341 |
| 21 | 119742311958753198301 |
| 22 | 1562281609210280404333 |
[1,1,3,17,125,1055,9755,96353,1000529,10805045, 120429581,1377565711,16103628975,191753782563, 2319792221739,28453553549889,353240252092329, 4432432002187105,56149270333672577, 717376886229388757,9236054560816552341, 119742311958753198301,1562281609210280404333] |