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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 112 |
| 4 | 756 |
| 5 | 3024 |
| 6 | 8176 |
| 7 | 18144 |
| 8 | 45360 |
| 9 | 104832 |
| 10 | 175392 |
| 11 | 269136 |
| 12 | 524272 |
[1,0,0,112,756,3024,8176,18144,45360,104832, 175392,269136,524272] |