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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 1 |
| 3 | -2 |
| 4 | -1 |
| 5 | 1 |
| 6 | 0 |
| 7 | -7 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | -14 |
| 12 | -13 |
| 13 | 2 |
| 14 | 1 |
| 15 | 120 |
| 16 | -46 |
| 17 | -65 |
| 18 | -15 |
| 19 | 5 |
| 20 | 1 |
| 21 | 0 |
| 22 | 516 |
| 23 | -356 |
| 24 | -165 |
| 25 | -5 |
| 26 | 9 |
| 27 | 1 |
| 28 | 5040 |
| 29 | 1392 |
| 30 | 266 |
| 31 | -1421 |
| 32 | -280 |
| 33 | 28 |
| 34 | 14 |
| 35 | 1 |
| 36 | 0 |
| 37 | 46320 |
| 38 | 3772 |
| 39 | -5740 |
| 40 | -3871 |
| 41 | -280 |
| 42 | 98 |
| 43 | 20 |
| 44 | 1 |
| 45 | 0 |
| 46 | 215280 |
| 47 | 212724 |
| 48 | -26272 |
| 49 | -31437 |
| 50 | -7791 |
| 51 | 126 |
| 52 | 222 |
| 53 | 27 |
| 54 | 1 |
[1,-1,1,-2,-1,1,0,-7,0,1,0,-14,-13,2,1,120,-46, -65,-15,5,1,0,516,-356,-165,-5,9,1,5040,1392,266, -1421,-280,28,14,1,0,46320,3772,-5740,-3871,-280, 98,20,1,0,215280,212724,-26272,-31437,-7791,126, 222,27,1] |