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| n | a(n) |
|---|---|
| 6 | 24 |
| 7 | 600 |
| 8 | 8244 |
| 9 | 83500 |
| 10 | 701164 |
| 11 | 5191412 |
| 12 | 35160560 |
| 13 | 223072440 |
| 14 | 1347354144 |
| 15 | 7836767696 |
| 16 | 44262649196 |
| 17 | 244280080420 |
| 18 | 1323563238484 |
| 19 | 7066323307308 |
| 20 | 37279810191336 |
| 21 | 194788586755056 |
| 22 | 1009815185486280 |
| 23 | 5201560257678600 |
[24,600,8244,83500,701164,5191412,35160560, 223072440,1347354144,7836767696,44262649196, 244280080420,1323563238484,7066323307308, 37279810191336,194788586755056,1009815185486280, 5201560257678600] |