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| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | 2 |
| 3 | -4 |
| 4 | 12 |
| 5 | -20 |
| 6 | 28 |
| 7 | -20 |
| 8 | 20 |
| 9 | -44 |
| 10 | 84 |
| 11 | -104 |
| 12 | 120 |
| 13 | -60 |
| 14 | 16 |
| 15 | -64 |
| 16 | 208 |
| 17 | -252 |
| 18 | 276 |
| 19 | -152 |
| 20 | 64 |
| 21 | -164 |
| 22 | 404 |
| 23 | -376 |
| 24 | 304 |
| 25 | -216 |
| 26 | 180 |
| 27 | -360 |
| 28 | 688 |
| 29 | -776 |
| 30 | 772 |
| 31 | -344 |
| 32 | 144 |
| 33 | -224 |
| 34 | 384 |
| 35 | -720 |
| 36 | 1080 |
| 37 | -540 |
| 38 | 288 |
| 39 | -704 |
| 40 | 1408 |
| 41 | -1536 |
| 42 | 1524 |
| 43 | -608 |
| 44 | 136 |
| 45 | -620 |
| 46 | 1764 |
| 47 | -1676 |
| 48 | 1444 |
| 49 | -944 |
| 50 | 544 |
[-1,2,-4,12,-20,28,-20,20,-44,84,-104,120,-60,16, -64,208,-252,276,-152,64,-164,404,-376,304,-216, 180,-360,688,-776,772,-344,144,-224,384,-720,1080, -540,288,-704,1408,-1536,1524,-608,136,-620,1764, -1676,1444,-944,544] |