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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 41 |
| 4 | 308 |
| 5 | 2469 |
| 6 | 20576 |
| 7 | 176366 |
| 8 | 1543209 |
| 9 | 13717421 |
| 10 | 1234567891 |
| 11 | 112233444637 |
| 12 | 10288065758426 |
| 13 | 949667608470093 |
| 14 | 88183420786508665 |
| 15 | 8230452606740808761 |
| 16 | 771604931881950821344 |
| 17 | 72621640647713018479506 |
[1,6,41,308,2469,20576,176366,1543209,13717421, 1234567891,112233444637,10288065758426, 949667608470093,88183420786508665, 8230452606740808761,771604931881950821344, 72621640647713018479506] |