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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | -1 |
| 5 | 1 |
| 6 | -2 |
| 7 | 2 |
| 8 | -2 |
| 9 | 3 |
| 10 | -4 |
| 11 | 4 |
| 12 | -5 |
| 13 | 6 |
| 14 | -6 |
| 15 | 9 |
| 16 | -11 |
| 17 | 10 |
| 18 | -14 |
| 19 | 16 |
| 20 | -17 |
| 21 | 22 |
| 22 | -24 |
| 23 | 26 |
| 24 | -32 |
| 25 | 37 |
| 26 | -40 |
| 27 | 47 |
| 28 | -54 |
| 29 | 58 |
| 30 | -70 |
| 31 | 80 |
| 32 | -84 |
| 33 | 100 |
| 34 | -112 |
| 35 | 122 |
| 36 | -143 |
| 37 | 158 |
| 38 | -172 |
| 39 | 198 |
| 40 | -222 |
| 41 | 242 |
| 42 | -274 |
| 43 | 306 |
| 44 | -332 |
| 45 | 379 |
| 46 | -422 |
| 47 | 454 |
| 48 | -515 |
| 49 | 569 |
| 50 | -620 |
| 51 | 698 |
| 52 | -766 |
| 53 | 834 |
| 54 | -932 |
| 55 | 1028 |
| 56 | -1118 |
[1,0,1,-1,1,-2,2,-2,3,-4,4,-5,6,-6,9,-11,10,-14, 16,-17,22,-24,26,-32,37,-40,47,-54,58,-70,80,-84, 100,-112,122,-143,158,-172,198,-222,242,-274,306, -332,379,-422,454,-515,569,-620,698,-766,834,-932, 1028,-1118] |