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| n | a(n) |
|---|---|
| 0 | 9 |
| 1 | 49 |
| 2 | 289 |
| 3 | 1729 |
| 4 | 10369 |
| 5 | 62209 |
| 6 | 373249 |
| 7 | 2239489 |
| 8 | 13436929 |
| 9 | 80621569 |
| 10 | 483729409 |
| 11 | 2902376449 |
| 12 | 17414258689 |
| 13 | 104485552129 |
| 14 | 626913312769 |
| 15 | 3761479876609 |
| 16 | 22568879259649 |
| 17 | 135413275557889 |
| 18 | 812479653347329 |
| 19 | 4874877920083969 |
| 20 | 29249267520503809 |
[9,49,289,1729,10369,62209,373249,2239489, 13436929,80621569,483729409,2902376449, 17414258689,104485552129,626913312769, 3761479876609,22568879259649,135413275557889, 812479653347329,4874877920083969, 29249267520503809] |