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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -2 |
| 3 | 1 |
| 4 | -5 |
| 5 | 3 |
| 6 | -12 |
| 7 | 7 |
| 8 | -25 |
| 9 | 17 |
| 10 | -47 |
| 11 | 36 |
| 12 | -88 |
| 13 | 69 |
| 14 | -155 |
| 15 | 133 |
| 16 | -262 |
| 17 | 240 |
| 18 | -439 |
| 19 | 415 |
| 20 | -717 |
| 21 | 705 |
| 22 | -1142 |
| 23 | 1165 |
| 24 | -1803 |
| 25 | 1874 |
| 26 | -2797 |
| 27 | 2975 |
| 28 | -4276 |
| 29 | 4632 |
| 30 | -6478 |
| 31 | 7094 |
| 32 | -9698 |
| 33 | 10741 |
| 34 | -14355 |
| 35 | 16059 |
| 36 | -21079 |
| 37 | 23719 |
| 38 | -30670 |
| 39 | 34716 |
| 40 | -44243 |
| 41 | 50315 |
| 42 | -63372 |
[0,-2,1,-5,3,-12,7,-25,17,-47,36,-88,69,-155,133, -262,240,-439,415,-717,705,-1142,1165,-1803,1874, -2797,2975,-4276,4632,-6478,7094,-9698,10741, -14355,16059,-21079,23719,-30670,34716,-44243, 50315,-63372] |