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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -2 |
| 3 | 3 |
| 4 | -5 |
| 5 | 7 |
| 6 | -10 |
| 7 | 14 |
| 8 | -20 |
| 9 | 27 |
| 10 | -36 |
| 11 | 48 |
| 12 | -63 |
| 13 | 82 |
| 14 | -106 |
| 15 | 137 |
| 16 | -175 |
| 17 | 222 |
| 18 | -280 |
| 19 | 352 |
| 20 | -439 |
| 21 | 546 |
| 22 | -676 |
| 23 | 834 |
| 24 | -1024 |
| 25 | 1253 |
| 26 | -1528 |
| 27 | 1857 |
| 28 | -2250 |
| 29 | 2718 |
| 30 | -3276 |
| 31 | 3936 |
| 32 | -4718 |
| 33 | 5640 |
| 34 | -6728 |
| 35 | 8006 |
| 36 | -9507 |
| 37 | 11266 |
| 38 | -13324 |
| 39 | 15726 |
| 40 | -18526 |
| 41 | 21786 |
| 42 | -25574 |
| 43 | 29970 |
| 44 | -35064 |
| 45 | 40961 |
[1,-2,3,-5,7,-10,14,-20,27,-36,48,-63,82,-106,137, -175,222,-280,352,-439,546,-676,834,-1024,1253, -1528,1857,-2250,2718,-3276,3936,-4718,5640,-6728, 8006,-9507,11266,-13324,15726,-18526,21786,-25574, 29970,-35064,40961] |