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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | -4 |
| 3 | 2 |
| 4 | -6 |
| 5 | -2 |
| 6 | -14 |
| 7 | -18 |
| 8 | -46 |
| 9 | -82 |
| 10 | -174 |
| 11 | -338 |
| 12 | -686 |
| 13 | -1362 |
| 14 | -2734 |
| 15 | -5458 |
| 16 | -10926 |
| 17 | -21842 |
| 18 | -43694 |
| 19 | -87378 |
| 20 | -174766 |
| 21 | -349522 |
| 22 | -699054 |
| 23 | -1398098 |
| 24 | -2796206 |
| 25 | -5592402 |
| 26 | -11184814 |
| 27 | -22369618 |
| 28 | -44739246 |
| 29 | -89478482 |
| 30 | -178956974 |
| 31 | -357913938 |
| 32 | -715827886 |
[1,3,-4,2,-6,-2,-14,-18,-46,-82,-174,-338,-686, -1362,-2734,-5458,-10926,-21842,-43694,-87378, -174766,-349522,-699054,-1398098,-2796206, -5592402,-11184814,-22369618,-44739246,-89478482, -178956974,-357913938,-715827886] |