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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | -6 |
| 3 | 9 |
| 4 | -36 |
| 5 | 30 |
| 6 | 16 |
| 7 | -120 |
| 8 | 240 |
| 9 | -140 |
| 10 | 25 |
| 11 | -300 |
| 12 | 1050 |
| 13 | -1400 |
| 14 | 630 |
| 15 | 36 |
| 16 | -630 |
| 17 | 3360 |
| 18 | -7560 |
| 19 | 7560 |
| 20 | -2772 |
| 21 | 49 |
| 22 | -1176 |
| 23 | 8820 |
| 24 | -29400 |
| 25 | 48510 |
| 26 | -38808 |
| 27 | 12012 |
| 28 | 64 |
| 29 | -2016 |
| 30 | 20160 |
| 31 | -92400 |
| 32 | 221760 |
| 33 | -288288 |
| 34 | 192192 |
| 35 | -51480 |
| 36 | 81 |
| 37 | -3240 |
| 38 | 41580 |
| 39 | -249480 |
| 40 | 810810 |
| 41 | -1513512 |
| 42 | 1621620 |
| 43 | -926640 |
| 44 | 218790 |
[1,4,-6,9,-36,30,16,-120,240,-140,25,-300,1050, -1400,630,36,-630,3360,-7560,7560,-2772,49,-1176, 8820,-29400,48510,-38808,12012,64,-2016,20160, -92400,221760,-288288,192192,-51480,81,-3240, 41580,-249480,810810,-1513512,1621620,-926640, 218790] |