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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | -1 |
| 4 | 2 |
| 5 | -3 |
| 6 | 4 |
| 7 | -5 |
| 8 | 6 |
| 9 | -7 |
| 10 | 8 |
| 11 | -9 |
| 12 | 10 |
| 13 | -11 |
| 14 | 12 |
| 15 | -13 |
| 16 | 14 |
| 17 | -15 |
| 18 | 16 |
| 19 | -17 |
| 20 | 18 |
| 21 | -19 |
| 22 | 20 |
| 23 | -21 |
| 24 | 22 |
| 25 | -23 |
| 26 | 24 |
| 27 | -25 |
| 28 | 26 |
| 29 | -27 |
| 30 | 28 |
| 31 | -29 |
| 32 | 30 |
| 33 | -31 |
| 34 | 32 |
| 35 | -33 |
| 36 | 34 |
| 37 | -35 |
| 38 | 36 |
| 39 | -37 |
| 40 | 38 |
| 41 | -39 |
| 42 | 40 |
| 43 | -41 |
| 44 | 42 |
| 45 | -43 |
| 46 | 44 |
| 47 | -45 |
| 48 | 46 |
| 49 | -47 |
| 50 | 48 |
| 51 | -49 |
| 52 | 50 |
| 53 | -51 |
| 54 | 52 |
| 55 | -53 |
| 56 | 54 |
| 57 | -55 |
| 58 | 56 |
| 59 | -57 |
| 60 | 58 |
| 61 | -59 |
| 62 | 60 |
[0,1,0,-1,2,-3,4,-5,6,-7,8,-9,10,-11,12,-13,14, -15,16,-17,18,-19,20,-21,22,-23,24,-25,26,-27,28, -29,30,-31,32,-33,34,-35,36,-37,38,-39,40,-41,42, -43,44,-45,46,-47,48,-49,50,-51,52,-53,54,-55,56, -57,58,-59,60] |