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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 75 |
| 4 | 779 |
| 5 | 8211 |
| 6 | 88301 |
| 7 | 960501 |
| 8 | 10536609 |
| 9 | 116366779 |
| 10 | 1292162535 |
| 11 | 14412747241 |
| 12 | 161362353297 |
| 13 | 1812334370533 |
| 14 | 20410840535049 |
| 15 | 230416525827147 |
| 16 | 2606567584536987 |
| 17 | 29540755940559963 |
| 18 | 335338507713978229 |
[1,7,75,779,8211,88301,960501,10536609,116366779, 1292162535,14412747241,161362353297,1812334370533, 20410840535049,230416525827147,2606567584536987, 29540755940559963,335338507713978229] |