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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 85 |
| 4 | 415 |
| 5 | 12019 |
| 6 | 13489 |
| 7 | 726301 |
| 8 | 3144919 |
| 9 | 30300391 |
| 10 | 32160403 |
| 11 | 4102360483 |
| 12 | 4301068993 |
| 13 | 758647585777 |
| 14 | 112686856171 |
| 15 | 3336876977 |
| 16 | 96568406789 |
| 17 | 28776062218037 |
| 18 | 29608882035581 |
| 19 | 1568274265798307 |
| 20 | 11256448518043769 |
[1,7,85,415,12019,13489,726301,3144919,30300391, 32160403,4102360483,4301068993,758647585777, 112686856171,3336876977,96568406789, 28776062218037,29608882035581,1568274265798307, 11256448518043769] |