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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | -3 |
| 4 | 10 |
| 5 | -12 |
| 6 | 15 |
| 7 | -30 |
| 8 | 6 |
| 9 | 21 |
| 10 | -60 |
| 11 | 30 |
| 12 | 28 |
| 13 | -105 |
| 14 | 90 |
| 15 | -10 |
| 16 | 36 |
| 17 | -168 |
| 18 | 210 |
| 19 | -60 |
| 20 | 45 |
| 21 | -252 |
| 22 | 420 |
| 23 | -210 |
| 24 | 15 |
| 25 | 55 |
| 26 | -360 |
| 27 | 756 |
| 28 | -560 |
| 29 | 105 |
| 30 | 66 |
| 31 | -495 |
| 32 | 1260 |
| 33 | -1260 |
| 34 | 420 |
| 35 | -21 |
| 36 | 78 |
| 37 | -660 |
| 38 | 1980 |
| 39 | -2520 |
| 40 | 1260 |
| 41 | -168 |
| 42 | 91 |
| 43 | -858 |
| 44 | 2970 |
| 45 | -4620 |
| 46 | 3150 |
| 47 | -756 |
| 48 | 28 |
| 49 | 105 |
| 50 | -1092 |
| 51 | 4290 |
| 52 | -7920 |
| 53 | 6930 |
| 54 | -2520 |
| 55 | 252 |
| 56 | 120 |
| 57 | -1365 |
[1,3,6,-3,10,-12,15,-30,6,21,-60,30,28,-105,90, -10,36,-168,210,-60,45,-252,420,-210,15,55,-360, 756,-560,105,66,-495,1260,-1260,420,-21,78,-660, 1980,-2520,1260,-168,91,-858,2970,-4620,3150,-756, 28,105,-1092,4290,-7920,6930,-2520,252,120,-1365] |