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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 7115472 |
| 6 | 650482560 |
| 7 | 30666813840 |
| 8 | 864472993020 |
| 9 | 16425424404480 |
| 10 | 228797610926976 |
| 11 | 2478981478165920 |
| 12 | 21826542254025600 |
| 13 | 161450244280291680 |
| 14 | 1029569646577080960 |
| 15 | 5777441080799208912 |
| 16 | 29003768615014027380 |
[1,0,0,0,0,7115472,650482560,30666813840, 864472993020,16425424404480,228797610926976, 2478981478165920,21826542254025600, 161450244280291680,1029569646577080960, 5777441080799208912,29003768615014027380] |