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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 3 |
| 3 | -7 |
| 4 | 14 |
| 5 | -27 |
| 6 | 55 |
| 7 | -110 |
| 8 | 219 |
| 9 | -439 |
| 10 | 878 |
| 11 | -1755 |
| 12 | 3511 |
| 13 | -7022 |
| 14 | 14043 |
| 15 | -28087 |
| 16 | 56174 |
| 17 | -112347 |
| 18 | 224695 |
| 19 | -449390 |
| 20 | 898779 |
| 21 | -1797559 |
| 22 | 3595118 |
| 23 | -7190235 |
| 24 | 14380471 |
| 25 | -28760942 |
| 26 | 57521883 |
| 27 | -115043767 |
| 28 | 230087534 |
| 29 | -460175067 |
| 30 | 920350135 |
| 31 | -1840700270 |
| 32 | 3681400539 |
| 33 | -7362801079 |
[1,-2,3,-7,14,-27,55,-110,219,-439,878,-1755,3511, -7022,14043,-28087,56174,-112347,224695,-449390, 898779,-1797559,3595118,-7190235,14380471, -28760942,57521883,-115043767,230087534, -460175067,920350135,-1840700270,3681400539, -7362801079] |