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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 25 |
| 4 | 349 |
| 5 | 19941 |
| 6 | 4440391 |
| 7 | 4382699203 |
| 8 | 17687865017481 |
| 9 | 356274213630958297 |
| 10 | 33338407933090938442411 |
| 11 | 16214021627369697901867402911 |
| 12 | 43817834057167927861655409052462093 |
| 13 | 595284492835035398061242850538179192931525 |
[1,2,5,25,349,19941,4440391,4382699203, 17687865017481,356274213630958297, 33338407933090938442411, 16214021627369697901867402911, 43817834057167927861655409052462093, 595284492835035398061242850538179192931525] |