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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 2 |
| 4 | 2 |
| 5 | -3 |
| 6 | 2 |
| 7 | -6 |
| 8 | 8 |
| 9 | -5 |
| 10 | 2 |
| 11 | 24 |
| 12 | -30 |
| 13 | 18 |
| 14 | -7 |
| 15 | 2 |
| 16 | -120 |
| 17 | 144 |
| 18 | -84 |
| 19 | 32 |
| 20 | -9 |
| 21 | 2 |
| 22 | 720 |
| 23 | -840 |
| 24 | 480 |
| 25 | -180 |
| 26 | 50 |
| 27 | -11 |
| 28 | 2 |
| 29 | -5040 |
| 30 | 5760 |
| 31 | -3240 |
| 32 | 1200 |
| 33 | -330 |
| 34 | 72 |
| 35 | -13 |
| 36 | 2 |
| 37 | 40320 |
| 38 | -45360 |
| 39 | 25200 |
| 40 | -9240 |
| 41 | 2520 |
| 42 | -546 |
| 43 | 98 |
| 44 | -15 |
| 45 | 2 |
| 46 | -362880 |
| 47 | 403200 |
| 48 | -221760 |
| 49 | 80640 |
| 50 | -21840 |
| 51 | 4704 |
| 52 | -840 |
| 53 | 128 |
| 54 | -17 |
| 55 | 2 |
[1,-1,2,2,-3,2,-6,8,-5,2,24,-30,18,-7,2,-120,144, -84,32,-9,2,720,-840,480,-180,50,-11,2,-5040,5760, -3240,1200,-330,72,-13,2,40320,-45360,25200,-9240, 2520,-546,98,-15,2,-362880,403200,-221760,80640, -21840,4704,-840,128,-17,2] |