| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 17 |
| 3 | 193 |
| 4 | 5427 |
| 5 | 463023 |
| 6 | 134675759 |
| 7 | 139917028089 |
| 8 | 527871326293913 |
| 9 | 7281357469833220843 |
| 10 | 368715613115281663650597 |
| 11 | 68787958348542935934247206953 |
| 12 | 47453320297069210448891035137347047 |
[1,3,17,193,5427,463023,134675759,139917028089, 527871326293913,7281357469833220843, 368715613115281663650597, 68787958348542935934247206953, 47453320297069210448891035137347047] |