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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 44916 |
| 5 | 4899200 |
| 6 | 570014364 |
| 7 | 62312057642 |
| 8 | 6859445695566 |
| 9 | 753992937156292 |
| 10 | 82884961506928674 |
| 11 | 9111820198577944474 |
| 12 | 1001675666375464430008 |
| 13 | 110115929289424892845128 |
| 14 | 12105240130837251432416920 |
[0,0,0,44916,4899200,570014364,62312057642, 6859445695566,753992937156292,82884961506928674, 9111820198577944474,1001675666375464430008, 110115929289424892845128, 12105240130837251432416920] |