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| n | a(n) |
|---|---|
| 1 | 255 |
| 2 | 1733 |
| 3 | 10720 |
| 4 | 71313 |
| 5 | 451481 |
| 6 | 2964676 |
| 7 | 18970267 |
| 8 | 123694345 |
| 9 | 795726064 |
| 10 | 5169185873 |
| 11 | 33344636925 |
| 12 | 216190905756 |
| 13 | 1396553927379 |
| 14 | 9045384191389 |
| 15 | 58474650871712 |
| 16 | 378535391931953 |
| 17 | 2448013308032361 |
| 18 | 15842822807262836 |
[255,1733,10720,71313,451481,2964676,18970267, 123694345,795726064,5169185873,33344636925, 216190905756,1396553927379,9045384191389, 58474650871712,378535391931953,2448013308032361, 15842822807262836] |