The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | -1 |
| 4 | 3 |
| 5 | 4 |
| 6 | -2 |
| 7 | 5 |
| 8 | 6 |
| 9 | -3 |
| 10 | 7 |
| 11 | 8 |
| 12 | -4 |
| 13 | 9 |
| 14 | 10 |
| 15 | -5 |
| 16 | 11 |
| 17 | 12 |
| 18 | -6 |
| 19 | 13 |
| 20 | 14 |
| 21 | -7 |
| 22 | 15 |
| 23 | 16 |
| 24 | -8 |
| 25 | 17 |
| 26 | 18 |
| 27 | -9 |
| 28 | 19 |
| 29 | 20 |
| 30 | -10 |
| 31 | 21 |
| 32 | 22 |
| 33 | -11 |
| 34 | 23 |
| 35 | 24 |
| 36 | -12 |
| 37 | 25 |
| 38 | 26 |
| 39 | -13 |
| 40 | 27 |
| 41 | 28 |
| 42 | -14 |
| 43 | 29 |
| 44 | 30 |
| 45 | -15 |
| 46 | 31 |
| 47 | 32 |
| 48 | -16 |
| 49 | 33 |
| 50 | 34 |
| 51 | -17 |
| 52 | 35 |
| 53 | 36 |
| 54 | -18 |
| 55 | 37 |
| 56 | 38 |
| 57 | -19 |
| 58 | 39 |
| 59 | 40 |
| 60 | -20 |
| 61 | 41 |
| 62 | 42 |
| 63 | -21 |
| 64 | 43 |
| 65 | 44 |
| 66 | -22 |
| 67 | 45 |
| 68 | 46 |
[0,1,2,-1,3,4,-2,5,6,-3,7,8,-4,9,10,-5,11,12,-6, 13,14,-7,15,16,-8,17,18,-9,19,20,-10,21,22,-11,23, 24,-12,25,26,-13,27,28,-14,29,30,-15,31,32,-16,33, 34,-17,35,36,-18,37,38,-19,39,40,-20,41,42,-21,43, 44,-22,45,46] |