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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | -1 |
| 6 | 0 |
| 7 | 3 |
| 8 | 6 |
| 9 | 3 |
| 10 | 0 |
| 11 | -14 |
| 12 | -45 |
| 13 | -46 |
| 14 | -15 |
| 15 | 0 |
| 16 | 80 |
| 17 | 400 |
| 18 | 655 |
| 19 | 440 |
| 20 | 105 |
| 21 | 0 |
| 22 | -468 |
| 23 | -3900 |
| 24 | -9585 |
| 25 | -10275 |
| 26 | -5067 |
| 27 | -945 |
| 28 | 0 |
| 29 | 2268 |
| 30 | 38556 |
| 31 | 142905 |
| 32 | 225750 |
| 33 | 177072 |
| 34 | 68334 |
| 35 | 10395 |
| 36 | 0 |
| 37 | -10224 |
| 38 | -360836 |
| 39 | -2099412 |
| 40 | -4796855 |
| 41 | -5482176 |
| 42 | -3355814 |
| 43 | -1056828 |
| 44 | -135135 |
[1,0,1,0,-1,-1,0,3,6,3,0,-14,-45,-46,-15,0,80,400, 655,440,105,0,-468,-3900,-9585,-10275,-5067,-945, 0,2268,38556,142905,225750,177072,68334,10395,0, -10224,-360836,-2099412,-4796855,-5482176, -3355814,-1056828,-135135] |