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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 4 |
| 8 | -8 |
| 9 | 6 |
| 10 | 0 |
| 11 | -36 |
| 12 | 72 |
| 13 | -60 |
| 14 | 24 |
| 15 | 0 |
| 16 | 600 |
| 17 | -1200 |
| 18 | 1020 |
| 19 | -480 |
| 20 | 120 |
| 21 | 0 |
| 22 | -16584 |
| 23 | 33168 |
| 24 | -28320 |
| 25 | 13776 |
| 26 | -4200 |
| 27 | 720 |
| 28 | 0 |
| 29 | 705600 |
| 30 | -1411200 |
| 31 | 1206240 |
| 32 | -591360 |
| 33 | 188160 |
| 34 | -40320 |
| 35 | 5040 |
| 36 | 0 |
| 37 | -43751232 |
| 38 | 87502464 |
| 39 | -74813760 |
| 40 | 36747648 |
| 41 | -11813760 |
| 42 | 2661120 |
| 43 | -423360 |
| 44 | 40320 |
[1,0,1,0,-1,2,0,4,-8,6,0,-36,72,-60,24,0,600, -1200,1020,-480,120,0,-16584,33168,-28320,13776, -4200,720,0,705600,-1411200,1206240,-591360, 188160,-40320,5040,0,-43751232,87502464,-74813760, 36747648,-11813760,2661120,-423360,40320] |