| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 15 |
| 3 | 208 |
| 4 | 2389 |
| 5 | 24845 |
| 6 | 243697 |
| 7 | 2348885 |
| 8 | 22837227 |
| 9 | 226507501 |
| 10 | 2285904554 |
| 11 | 23239957877 |
| 12 | 235731610792 |
| 13 | 2372897841904 |
| 14 | 23686630752065 |
| 15 | 235058927877399 |
| 16 | 2327977363798607 |
[1,15,208,2389,24845,243697,2348885,22837227, 226507501,2285904554,23239957877,235731610792, 2372897841904,23686630752065,235058927877399, 2327977363798607] |