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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 9 |
| 4 | 114 |
| 5 | 3810 |
| 6 | 103185 |
| 7 | 2729181 |
| 8 | 69340908 |
| 9 | 1835068068 |
| 10 | 46949243445 |
| 11 | 1072699180795 |
| 12 | 22440539853666 |
| 13 | 442180822802082 |
| 14 | 8348531623530553 |
| 15 | 152424934237053765 |
| 16 | 2702148696449820840 |
| 17 | 46523455154624265192 |
[1,9,114,3810,103185,2729181,69340908,1835068068, 46949243445,1072699180795,22440539853666, 442180822802082,8348531623530553, 152424934237053765,2702148696449820840, 46523455154624265192] |