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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 48 |
| 4 | 600 |
| 5 | 32256 |
| 6 | 1177344 |
| 7 | 268369920 |
| 8 | 36506664960 |
| 9 | 35184338534400 |
| 10 | 18577347909255168 |
| 11 | 73786976226118729728 |
| 12 | 153476910691030086451200 |
| 13 | 2475880078570197599844827136 |
| 14 | 20440865928680162788862343512064 |
| 15 | 1329227995784915854457062986570792960 |
[0,3,48,600,32256,1177344,268369920,36506664960, 35184338534400,18577347909255168, 73786976226118729728,153476910691030086451200, 2475880078570197599844827136, 20440865928680162788862343512064, 1329227995784915854457062986570792960] |