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| n | a(n) |
|---|---|
| 0 | 9 |
| 1 | 43 |
| 2 | 249 |
| 3 | 1451 |
| 4 | 8457 |
| 5 | 49291 |
| 6 | 287289 |
| 7 | 1674443 |
| 8 | 9759369 |
| 9 | 56881771 |
| 10 | 331531257 |
| 11 | 1932305771 |
| 12 | 11262303369 |
| 13 | 65641514443 |
| 14 | 382586783289 |
| 15 | 2229879185291 |
| 16 | 12996688328457 |
| 17 | 75750250785451 |
| 18 | 441504816384249 |
| 19 | 2573278647520043 |
| 20 | 14998167068736009 |
| 21 | 87415723764896011 |
[9,43,249,1451,8457,49291,287289,1674443,9759369, 56881771,331531257,1932305771,11262303369, 65641514443,382586783289,2229879185291, 12996688328457,75750250785451,441504816384249, 2573278647520043,14998167068736009, 87415723764896011] |