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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 2 |
| 6 | -3 |
| 7 | 4 |
| 8 | -4 |
| 9 | 4 |
| 10 | -10 |
| 11 | 14 |
| 12 | -25 |
| 13 | 30 |
| 14 | -48 |
| 15 | 48 |
| 16 | -86 |
| 17 | 128 |
| 18 | -192 |
| 19 | 286 |
| 20 | -470 |
| 21 | 578 |
| 22 | -1000 |
| 23 | 1386 |
| 24 | -2423 |
| 25 | 3172 |
| 26 | -5198 |
| 27 | 7102 |
| 28 | -11994 |
| 29 | 16414 |
| 30 | -25820 |
| 31 | 38056 |
| 32 | -61444 |
| 33 | 86658 |
| 34 | -141564 |
| 35 | 203396 |
| 36 | -324640 |
| 37 | 475536 |
| 38 | -767110 |
| 39 | 1100728 |
| 40 | -1810752 |
| 41 | 2601166 |
| 42 | -4118166 |
| 43 | 6114666 |
[1,0,1,0,2,-3,4,-4,4,-10,14,-25,30,-48,48,-86,128, -192,286,-470,578,-1000,1386,-2423,3172,-5198, 7102,-11994,16414,-25820,38056,-61444,86658, -141564,203396,-324640,475536,-767110,1100728, -1810752,2601166,-4118166,6114666] |