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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 19 |
| 2 | 524287 |
| 3 | 581130733 |
| 4 | 91625968981 |
| 5 | 4768371582031 |
| 6 | 121871948002099 |
| 7 | 1899815864228857 |
| 8 | 20587884010836553 |
| 9 | 168856464709124011 |
| 10 | 1111111111111111111 |
| 11 | 6115909044841454629 |
| 12 | 29043636306420266077 |
| 13 | 121826690864620509223 |
| 14 | 459715689149916492091 |
| 15 | 1583455585752214704241 |
[1,19,524287,581130733,91625968981,4768371582031, 121871948002099,1899815864228857, 20587884010836553,168856464709124011, 1111111111111111111,6115909044841454629, 29043636306420266077,121826690864620509223, 459715689149916492091,1583455585752214704241] |