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