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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 8 |
| 3 | -36 |
| 4 | 128 |
| 5 | -288 |
| 6 | 1166 |
| 7 | -16048 |
| 8 | 77328 |
| 9 | -108780 |
| 10 | 220440 |
| 11 | -5900816 |
| 12 | 44395366 |
| 13 | -339891804 |
| 14 | 898603106 |
| 15 | -5623621248 |
| 16 | 2160154604 |
| 17 | -22569496436 |
| 18 | 930080367404 |
| 19 | -11435095847280 |
| 20 | 54170773716302 |
| 21 | -95118392809132 |
| 22 | 264120000910222 |
| 23 | -449060398964736 |
| 24 | 10522002570379158 |
| 25 | -174697886314749868 |
| 26 | 1461399560338555304 |
| 27 | -10156216740712605688 |
| 28 | 35485949488006257078 |
| 29 | -90157116358607006060 |
| 30 | 722914685477655291098 |
[1,-2,8,-36,128,-288,1166,-16048,77328,-108780, 220440,-5900816,44395366,-339891804,898603106, -5623621248,2160154604,-22569496436,930080367404, -11435095847280,54170773716302,-95118392809132, 264120000910222,-449060398964736, 10522002570379158,-174697886314749868, 1461399560338555304,-10156216740712605688, 35485949488006257078,-90157116358607006060, 722914685477655291098] |