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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 85 |
| 3 | 1351 |
| 4 | 23281 |
| 5 | 422527 |
| 6 | 7951069 |
| 7 | 153458935 |
| 8 | 3018043777 |
| 9 | 60225528727 |
| 10 | 1215821974885 |
| 11 | 24777776573095 |
| 12 | 508935634491025 |
| 13 | 10522995625652335 |
| 14 | 218814097786515085 |
| 15 | 4572338217781407031 |
| 16 | 95953172529722919937 |
| 17 | 2021236451413828339495 |
| 18 | 42719661851354642952181 |
[1,7,85,1351,23281,422527,7951069,153458935, 3018043777,60225528727,1215821974885, 24777776573095,508935634491025,10522995625652335, 218814097786515085,4572338217781407031, 95953172529722919937,2021236451413828339495, 42719661851354642952181] |