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| n | a(n) |
|---|---|
| 2 | -1 |
| 3 | -2 |
| 4 | 0 |
| 5 | 0 |
| 6 | -32 |
| 7 | 256 |
| 8 | 0 |
| 9 | 0 |
| 10 | -8192 |
| 11 | 0 |
| 12 | -262144 |
| 13 | 5242880 |
| 14 | 0 |
| 15 | 0 |
| 16 | -33554432 |
| 17 | 0 |
| 18 | -2684354560 |
| 19 | 0 |
| 20 | 0 |
| 21 | 8589934592000 |
| 22 | 0 |
| 23 | 0 |
| 24 | 932385860354048 |
| 25 | 160159261748363264 |
| 26 | -1125899906842624 |
| 27 | 0 |
| 28 | 0 |
| 29 | -225179981368524800 |
| 30 | 5260204364768739328 |
| 31 | 0 |
| 32 | 0 |
[-1,-2,0,0,-32,256,0,0,-8192,0,-262144,5242880,0, 0,-33554432,0,-2684354560,0,0,8589934592000,0,0, 932385860354048,160159261748363264, -1125899906842624,0,0,-225179981368524800, 5260204364768739328,0,0] |