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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 77 |
| 3 | 1071 |
| 4 | 17689 |
| 5 | 335083 |
| 6 | 7117789 |
| 7 | 166862583 |
| 8 | 4266097185 |
| 9 | 117856459427 |
| 10 | 3492369757317 |
| 11 | 110332338885167 |
| 12 | 3697474419284233 |
| 13 | 130877053323860507 |
| 14 | 4875005854140483629 |
| 15 | 190478720135836588519 |
| 16 | 7784916624799021983345 |
| 17 | 331981949761308979115795 |
[1,7,77,1071,17689,335083,7117789,166862583, 4266097185,117856459427,3492369757317, 110332338885167,3697474419284233, 130877053323860507,4875005854140483629, 190478720135836588519,7784916624799021983345, 331981949761308979115795] |