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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 124 |
| 4 | 2225 |
| 5 | 56546 |
| 6 | 1928707 |
| 7 | 85029596 |
| 8 | 4687436609 |
| 9 | 314255427490 |
| 10 | 25077179715131 |
| 11 | 2343489559096412 |
| 12 | 253185531592066801 |
| 13 | 31279831940279656514 |
| 14 | 4376923336721600128115 |
| 15 | 687815536092999747916156 |
| 16 | 120491486068612766739548417 |
| 17 | 23378730923206887237941740226 |
[1,2,11,124,2225,56546,1928707,85029596, 4687436609,314255427490,25077179715131, 2343489559096412,253185531592066801, 31279831940279656514,4376923336721600128115, 687815536092999747916156, 120491486068612766739548417, 23378730923206887237941740226] |