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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -3 |
| 3 | 1 |
| 4 | -30 |
| 5 | 5 |
| 6 | -1 |
| 7 | 315 |
| 8 | 525 |
| 9 | -7 |
| 10 | 1 |
| 11 | -1260 |
| 12 | 18270 |
| 13 | -2940 |
| 14 | 9 |
| 15 | -1 |
| 16 | 3465 |
| 17 | -496650 |
| 18 | -695310 |
| 19 | 10395 |
| 20 | -11 |
| 21 | 1 |
| 22 | -7722 |
| 23 | 4279275 |
| 24 | -52144092 |
| 25 | 7702695 |
| 26 | -28314 |
| 27 | 13 |
| 28 | -1 |
| 29 | 15015 |
| 30 | -22387365 |
| 31 | 2701093395 |
| 32 | 3472834365 |
| 33 | -49252203 |
| 34 | 65065 |
| 35 | -15 |
| 36 | 1 |
| 37 | -26520 |
| 38 | 86786700 |
| 39 | -40541436936 |
| 40 | 454101489270 |
| 41 | -63707972328 |
| 42 | 225645420 |
| 43 | -132600 |
| 44 | 17 |
[1,-1,-3,1,-30,5,-1,315,525,-7,1,-1260,18270, -2940,9,-1,3465,-496650,-695310,10395,-11,1,-7722, 4279275,-52144092,7702695,-28314,13,-1,15015, -22387365,2701093395,3472834365,-49252203,65065, -15,1,-26520,86786700,-40541436936,454101489270, -63707972328,225645420,-132600,17] |