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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | -3 |
| 4 | 2 |
| 5 | 5 |
| 6 | -15 |
| 7 | 3 |
| 8 | -14 |
| 9 | 56 |
| 10 | -42 |
| 11 | 4 |
| 12 | 54 |
| 13 | -170 |
| 14 | 290 |
| 15 | -90 |
| 16 | 5 |
| 17 | -264 |
| 18 | 744 |
| 19 | -1350 |
| 20 | 1000 |
| 21 | -165 |
| 22 | 6 |
| 23 | 1560 |
| 24 | -4116 |
| 25 | 6174 |
| 26 | -7210 |
| 27 | 2695 |
| 28 | -273 |
| 29 | 7 |
| 30 | -10800 |
| 31 | 27264 |
| 32 | -37296 |
| 33 | 41664 |
| 34 | -28420 |
| 35 | 6160 |
| 36 | -420 |
| 37 | 8 |
| 38 | 85680 |
| 39 | -209520 |
| 40 | 270864 |
| 41 | -260064 |
| 42 | 223524 |
| 43 | -89964 |
| 44 | 12516 |
| 45 | -612 |
| 46 | 9 |
| 47 | -766080 |
| 48 | 1828800 |
| 49 | -2274480 |
| 50 | 2021760 |
| 51 | -1587600 |
[0,1,-3,2,5,-15,3,-14,56,-42,4,54,-170,290,-90,5, -264,744,-1350,1000,-165,6,1560,-4116,6174,-7210, 2695,-273,7,-10800,27264,-37296,41664,-28420,6160, -420,8,85680,-209520,270864,-260064,223524,-89964, 12516,-612,9,-766080,1828800,-2274480,2021760, -1587600] |