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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 10 |
| 5 | 26 |
| 6 | 96 |
| 7 | 553 |
| 8 | 5461 |
| 9 | 100709 |
| 10 | 3718354 |
| 11 | 289725508 |
| 12 | 49224068017 |
| 13 | 13203989190379 |
| 14 | 2498210880028303 |
| 15 | 272472900722736282 |
| 16 | 18445455348353453707 |
| 17 | 846271790301299050986 |
| 18 | 28189314873080070171124 |
[2,3,5,10,26,96,553,5461,100709,3718354,289725508, 49224068017,13203989190379,2498210880028303, 272472900722736282,18445455348353453707, 846271790301299050986,28189314873080070171124] |