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| n | a(n) |
|---|---|
| 4 | 13 |
| 5 | 114 |
| 6 | 924 |
| 7 | 8152 |
| 8 | 79682 |
| 9 | 845874 |
| 10 | 9699504 |
| 11 | 119751978 |
| 12 | 1586912838 |
| 13 | 22489462512 |
| 14 | 339643322952 |
| 15 | 5448229269576 |
| 16 | 92547041455104 |
| 17 | 1660105401121800 |
| 18 | 31366215961317480 |
| 19 | 622755664408102200 |
| 20 | 12964583019385962840 |
| 21 | 282431877654287832480 |
| 22 | 6426548730391132252800 |
[13,114,924,8152,79682,845874,9699504,119751978, 1586912838,22489462512,339643322952,5448229269576, 92547041455104,1660105401121800,31366215961317480, 622755664408102200,12964583019385962840, 282431877654287832480,6426548730391132252800] |