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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 13 |
| 3 | 172 |
| 4 | 3809 |
| 5 | 126526 |
| 6 | 5874517 |
| 7 | 362848088 |
| 8 | 28744087297 |
| 9 | 2839192902874 |
| 10 | 341922922464701 |
| 11 | 49297062811573732 |
| 12 | 8380916229314577313 |
| 13 | 1658770724530766046422 |
| 14 | 378056469777362366873989 |
| 15 | 98286603829297813268996176 |
| 16 | 28907477297195536067142301697 |
[1,2,13,172,3809,126526,5874517,362848088, 28744087297,2839192902874,341922922464701, 49297062811573732,8380916229314577313, 1658770724530766046422,378056469777362366873989, 98286603829297813268996176, 28907477297195536067142301697] |