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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 65 |
| 3 | 807 |
| 4 | 12993 |
| 5 | 260103 |
| 6 | 6243201 |
| 7 | 174811815 |
| 8 | 5593984641 |
| 9 | 201383466759 |
| 10 | 8055338729409 |
| 11 | 354434904271143 |
| 12 | 17012875405546305 |
| 13 | 884669521090002183 |
| 14 | 49541493181044905217 |
| 15 | 2972489590862708661927 |
| 16 | 190239333815213397410049 |
| 17 | 12936274699434511153023495 |
[1,7,65,807,12993,260103,6243201,174811815, 5593984641,201383466759,8055338729409, 354434904271143,17012875405546305, 884669521090002183,49541493181044905217, 2972489590862708661927,190239333815213397410049, 12936274699434511153023495] |