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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 0 |
| 4 | 6 |
| 5 | 24 |
| 6 | 0 |
| 7 | 24 |
| 8 | 270 |
| 9 | 540 |
| 10 | 0 |
| 11 | 120 |
| 12 | 2640 |
| 13 | 13440 |
| 14 | 17920 |
| 15 | 0 |
| 16 | 720 |
| 17 | 26250 |
| 18 | 245000 |
| 19 | 787500 |
| 20 | 787500 |
| 21 | 0 |
| 22 | 5040 |
| 23 | 276192 |
| 24 | 4082400 |
| 25 | 23133600 |
| 26 | 53887680 |
| 27 | 43110144 |
| 28 | 0 |
| 29 | 40320 |
| 30 | 3111696 |
| 31 | 66843840 |
| 32 | 582362550 |
| 33 | 2329450200 |
| 34 | 4239599364 |
| 35 | 2826399576 |
[1,0,2,0,6,24,0,24,270,540,0,120,2640,13440,17920, 0,720,26250,245000,787500,787500,0,5040,276192, 4082400,23133600,53887680,43110144,0,40320, 3111696,66843840,582362550,2329450200,4239599364, 2826399576] |