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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 11328 |
| 3 | 11211192 |
| 4 | 15277006080 |
| 5 | 24934429725000 |
| 6 | 45695805580701504 |
| 7 | 90784545100668913368 |
| 8 | 191417861328822311040000 |
| 9 | 422458626725600682506889600 |
| 10 | 966695515158024385775097720000 |
| 11 | 2277925055026596846727033776223416 |
| 12 | 5499697195473757755136472944165075200 |
[1,24,11328,11211192,15277006080,24934429725000, 45695805580701504,90784545100668913368, 191417861328822311040000, 422458626725600682506889600, 966695515158024385775097720000, 2277925055026596846727033776223416, 5499697195473757755136472944165075200] |