| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 16 |
| 5 | 130 |
| 6 | 1424 |
| 7 | 23682 |
| 8 | 637328 |
| 9 | 28867714 |
| 10 | 2260015504 |
| 11 | 311718542466 |
| 12 | 76844461332880 |
| 13 | 34239915581996162 |
| 14 | 27825107366882974096 |
| 15 | 41547917209230771715202 |
| 16 | 114704977949192346233608592 |
| 17 | 588650824552337332645472468098 |
[2,16,130,1424,23682,637328,28867714,2260015504, 311718542466,76844461332880,34239915581996162, 27825107366882974096,41547917209230771715202, 114704977949192346233608592, 588650824552337332645472468098] |