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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 0 |
| 1 | 1 |
| 2 | -2 |
| 3 | 4 |
| 4 | -4 |
| 5 | 5 |
| 6 | -6 |
| 7 | 9 |
| 8 | -12 |
| 9 | 13 |
| 10 | -18 |
| 11 | 25 |
| 12 | -28 |
| 13 | 33 |
| 14 | -44 |
| 15 | 54 |
| 16 | -64 |
| 17 | 74 |
| 18 | -92 |
| 19 | 114 |
| 20 | -132 |
| 21 | 155 |
| 22 | -186 |
| 23 | 224 |
| 24 | -260 |
| 25 | 303 |
| 26 | -360 |
| 27 | 424 |
| 28 | -488 |
| 29 | 565 |
| 30 | -662 |
| 31 | 770 |
| 32 | -888 |
| 33 | 1018 |
| 34 | -1180 |
| 35 | 1366 |
| 36 | -1560 |
| 37 | 1780 |
| 38 | -2048 |
| 39 | 2345 |
| 40 | -2668 |
| 41 | 3034 |
| 42 | -3460 |
| 43 | 3946 |
| 44 | -4468 |
| 45 | 5052 |
| 46 | -5734 |
| 47 | 6502 |
| 48 | -7328 |
| 49 | 8255 |
| 50 | -9320 |
| 51 | 10512 |
| 52 | -11808 |
[1,0,1,-2,4,-4,5,-6,9,-12,13,-18,25,-28,33,-44,54, -64,74,-92,114,-132,155,-186,224,-260,303,-360, 424,-488,565,-662,770,-888,1018,-1180,1366,-1560, 1780,-2048,2345,-2668,3034,-3460,3946,-4468,5052, -5734,6502,-7328,8255,-9320,10512,-11808] |