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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 16 |
| 3 | 1504 |
| 4 | 361392 |
| 5 | 161889216 |
| 6 | 116561117520 |
| 7 | 123088454370720 |
| 8 | 179216801666043120 |
| 9 | 344096256861334857600 |
| 10 | 842347637388219301894800 |
| 11 | 2560736817470194362347292000 |
| 12 | 9464483277445284311686053822000 |
| 13 | 41795158153162079160478354766472000 |
[0,0,16,1504,361392,161889216,116561117520, 123088454370720,179216801666043120, 344096256861334857600,842347637388219301894800, 2560736817470194362347292000, 9464483277445284311686053822000, 41795158153162079160478354766472000] |