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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | -4 |
| 7 | 4 |
| 8 | 1 |
| 9 | -8 |
| 10 | 12 |
| 11 | 1 |
| 12 | -16 |
| 13 | 76 |
| 14 | -96 |
| 15 | 1 |
| 16 | -32 |
| 17 | 260 |
| 18 | -400 |
| 19 | 1 |
| 20 | -64 |
| 21 | 1324 |
| 22 | -9600 |
| 23 | 14400 |
| 24 | 1 |
| 25 | -128 |
| 26 | 4760 |
| 27 | -50176 |
| 28 | 82320 |
| 29 | 1 |
| 30 | -256 |
| 31 | 22348 |
| 32 | -771232 |
| 33 | 8479744 |
| 34 | -14049280 |
| 35 | 1 |
| 36 | -512 |
| 37 | 82452 |
| 38 | -4517424 |
| 39 | 63576576 |
| 40 | -109734912 |
| 41 | 1 |
| 42 | -1024 |
| 43 | 371284 |
| 44 | -57164880 |
| 45 | 3387844800 |
| 46 | -52272864000 |
| 47 | 91445760000 |
[1,1,-1,1,-2,1,-4,4,1,-8,12,1,-16,76,-96,1,-32, 260,-400,1,-64,1324,-9600,14400,1,-128,4760, -50176,82320,1,-256,22348,-771232,8479744, -14049280,1,-512,82452,-4517424,63576576, -109734912,1,-1024,371284,-57164880,3387844800, -52272864000,91445760000] |