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| n | a(n) |
|---|---|
| 0 | 27 |
| 1 | 2871 |
| 2 | 39663 |
| 3 | 326367 |
| 4 | 2123199 |
| 5 | 12126591 |
| 6 | 63900927 |
| 7 | 319163391 |
| 8 | 1535375871 |
| 9 | 7186396671 |
| 10 | 32947236351 |
| 11 | 148643831295 |
| 12 | 662099705343 |
| 13 | 2918722534911 |
| 14 | 12756670414335 |
| 15 | 55354839662079 |
| 16 | 238734196604415 |
| 17 | 1024200814362111 |
| 18 | 4373869249953279 |
[27,2871,39663,326367,2123199,12126591,63900927, 319163391,1535375871,7186396671,32947236351, 148643831295,662099705343,2918722534911, 12756670414335,55354839662079,238734196604415, 1024200814362111,4373869249953279] |