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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | 1 |
| 5 | -5 |
| 6 | 9 |
| 7 | -3 |
| 8 | -29 |
| 9 | 89 |
| 10 | -107 |
| 11 | -121 |
| 12 | 833 |
| 13 | -1703 |
| 14 | 631 |
| 15 | 6705 |
| 16 | -21943 |
| 17 | 27587 |
| 18 | 34937 |
| 19 | -242427 |
| 20 | 507739 |
| 21 | -172615 |
| 22 | -2201619 |
| 23 | 7253775 |
| 24 | -9083263 |
| 25 | -12931023 |
| 26 | 86757487 |
| 27 | -181330015 |
| 28 | 52436881 |
| 29 | 843605643 |
| 30 | -2751023447 |
| 31 | 3373429837 |
| 32 | 5393254483 |
| 33 | -34585122919 |
[0,1,-1,1,1,-5,9,-3,-29,89,-107,-121,833,-1703, 631,6705,-21943,27587,34937,-242427,507739, -172615,-2201619,7253775,-9083263,-12931023, 86757487,-181330015,52436881,843605643, -2751023447,3373429837,5393254483,-34585122919] |