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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 2 |
| 5 | -3 |
| 6 | 4 |
| 7 | -5 |
| 8 | 6 |
| 9 | -8 |
| 10 | 10 |
| 11 | -12 |
| 12 | 15 |
| 13 | -18 |
| 14 | 22 |
| 15 | -27 |
| 16 | 32 |
| 17 | -38 |
| 18 | 46 |
| 19 | -54 |
| 20 | 64 |
| 21 | -76 |
| 22 | 89 |
| 23 | -104 |
| 24 | 122 |
| 25 | -142 |
| 26 | 165 |
| 27 | -192 |
| 28 | 222 |
| 29 | -256 |
| 30 | 296 |
| 31 | -340 |
| 32 | 390 |
| 33 | -448 |
| 34 | 512 |
| 35 | -585 |
| 36 | 668 |
| 37 | -760 |
| 38 | 864 |
| 39 | -982 |
| 40 | 1113 |
| 41 | -1260 |
| 42 | 1426 |
| 43 | -1610 |
| 44 | 1816 |
| 45 | -2048 |
| 46 | 2304 |
| 47 | -2590 |
| 48 | 2910 |
| 49 | -3264 |
| 50 | 3658 |
| 51 | -4097 |
| 52 | 4582 |
| 53 | -5120 |
| 54 | 5718 |
| 55 | -6378 |
[1,-1,1,-2,2,-3,4,-5,6,-8,10,-12,15,-18,22,-27,32, -38,46,-54,64,-76,89,-104,122,-142,165,-192,222, -256,296,-340,390,-448,512,-585,668,-760,864,-982, 1113,-1260,1426,-1610,1816,-2048,2304,-2590,2910, -3264,3658,-4097,4582,-5120,5718,-6378] |