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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 5 |
| 4 | 17 |
| 5 | 11 |
| 6 | 23 |
| 7 | 2957 |
| 8 | 23117 |
| 9 | 204557 |
| 10 | 2018957 |
| 11 | 37313 |
| 12 | 296797 |
| 13 | 39229 |
| 14 | 622561 |
| 15 | 1832213 |
| 16 | 87616043 |
| 17 | 2462521469 |
| 18 | 17209100320681 |
| 19 | 5207129 |
| 20 | 2558906768309 |
| 21 | 135954526571 |
| 22 | 85412472868721 |
| 23 | 3075880875779 |
[1,2,4,5,17,11,23,2957,23117,204557,2018957,37313, 296797,39229,622561,1832213,87616043,2462521469, 17209100320681,5207129,2558906768309,135954526571, 85412472868721,3075880875779] |