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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | -11 |
| 4 | -6 |
| 5 | 1 |
| 6 | 40 |
| 7 | 70 |
| 8 | 15 |
| 9 | -1 |
| 10 | -116 |
| 11 | -328 |
| 12 | -240 |
| 13 | -28 |
| 14 | 1 |
| 15 | 304 |
| 16 | 1176 |
| 17 | 1456 |
| 18 | 610 |
| 19 | 45 |
| 20 | -1 |
| 21 | -752 |
| 22 | -3680 |
| 23 | -6408 |
| 24 | -4704 |
| 25 | -1295 |
| 26 | -66 |
| 27 | 1 |
| 28 | 1792 |
| 29 | 10592 |
| 30 | 23760 |
| 31 | 25080 |
| 32 | 12432 |
| 33 | 2436 |
| 34 | 91 |
| 35 | -1 |
| 36 | -4160 |
| 37 | -28800 |
| 38 | -79040 |
[1,-1,-11,-6,1,40,70,15,-1,-116,-328,-240,-28,1, 304,1176,1456,610,45,-1,-752,-3680,-6408,-4704, -1295,-66,1,1792,10592,23760,25080,12432,2436,91, -1,-4160,-28800,-79040] |