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| n | a(n) |
|---|---|
| 1 | 181 |
| 2 | 1473 |
| 3 | 11239 |
| 4 | 89555 |
| 5 | 703565 |
| 6 | 5579529 |
| 7 | 44112111 |
| 8 | 349456139 |
| 9 | 2766556005 |
| 10 | 21911565169 |
| 11 | 173518250295 |
| 12 | 1374222186243 |
| 13 | 10883168081725 |
| 14 | 86191072211609 |
| 15 | 682600082348735 |
| 16 | 5405952460295995 |
| 17 | 42813179725209813 |
| 18 | 339065137371681409 |
[181,1473,11239,89555,703565,5579529,44112111, 349456139,2766556005,21911565169,173518250295, 1374222186243,10883168081725,86191072211609, 682600082348735,5405952460295995, 42813179725209813,339065137371681409] |