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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -2 |
| 3 | -3 |
| 4 | 0 |
| 5 | -5 |
| 6 | 6 |
| 7 | -7 |
| 8 | 0 |
| 9 | 0 |
| 10 | 10 |
| 11 | -11 |
| 12 | 0 |
| 13 | -13 |
| 14 | 14 |
| 15 | 15 |
| 16 | 0 |
| 17 | -17 |
| 18 | 0 |
| 19 | -19 |
| 20 | 0 |
| 21 | 21 |
| 22 | 22 |
| 23 | -23 |
| 24 | 0 |
| 25 | 0 |
| 26 | 26 |
| 27 | 0 |
| 28 | 0 |
| 29 | -29 |
| 30 | 30 |
| 31 | -31 |
| 32 | 0 |
| 33 | 33 |
| 34 | 34 |
| 35 | 35 |
| 36 | 0 |
| 37 | -37 |
| 38 | 38 |
| 39 | 39 |
| 40 | 0 |
| 41 | -41 |
| 42 | 42 |
| 43 | -43 |
| 44 | 0 |
| 45 | 0 |
| 46 | 46 |
| 47 | -47 |
| 48 | 0 |
[1,-2,-3,0,-5,6,-7,0,0,10,-11,0,-13,14,15,0,-17,0, -19,0,21,22,-23,0,0,26,0,0,-29,30,-31,0,33,34,35, 0,-37,38,39,0,-41,42,-43,0,0,46,-47,0] |