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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 0 |
| 4 | -1 |
| 5 | -1 |
| 6 | 2 |
| 7 | -4 |
| 8 | 4 |
| 9 | -7 |
| 10 | 8 |
| 11 | -10 |
| 12 | 9 |
| 13 | -5 |
| 14 | -6 |
| 15 | 19 |
| 16 | -40 |
| 17 | 70 |
| 18 | -110 |
| 19 | 138 |
| 20 | -158 |
| 21 | 154 |
| 22 | -93 |
| 23 | -70 |
| 24 | 355 |
| 25 | -797 |
| 26 | 1408 |
| 27 | -2160 |
| 28 | 2925 |
| 29 | -3479 |
| 30 | 3399 |
| 31 | -2080 |
| 32 | -1299 |
| 33 | 7593 |
| 34 | -17673 |
| 35 | 32014 |
| 36 | -49928 |
| 37 | 68683 |
| 38 | -82847 |
| 39 | 82807 |
| 40 | -53620 |
| 41 | -24942 |
| 42 | 176293 |
| 43 | -422887 |
| 44 | 777264 |
| 45 | -1226688 |
| 46 | 1710686 |
| 47 | -2093347 |
[1,-1,0,-1,-1,2,-4,4,-7,8,-10,9,-5,-6,19,-40,70, -110,138,-158,154,-93,-70,355,-797,1408,-2160, 2925,-3479,3399,-2080,-1299,7593,-17673,32014, -49928,68683,-82847,82807,-53620,-24942,176293, -422887,777264,-1226688,1710686,-2093347] |