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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 8 |
| 3 | -10 |
| 4 | 24 |
| 5 | 0 |
| 6 | 280 |
| 7 | -676 |
| 8 | 1632 |
| 9 | -1970 |
| 10 | 0 |
| 11 | 0 |
| 12 | 27720 |
| 13 | -133844 |
| 14 | 646256 |
| 15 | 0 |
| 16 | 941664 |
| 17 | 0 |
| 18 | 10976840 |
| 19 | -26500436 |
| 20 | 0 |
| 21 | -154455860 |
| 22 | 0 |
| 23 | 0 |
| 24 | 2173358880 |
| 25 | -2623476242 |
| 26 | 25334527696 |
| 27 | -15290740090 |
| 28 | 73830224208 |
| 29 | 0 |
| 30 | 0 |
| 31 | -1038870091396 |
| 32 | 2508054264192 |
| 33 | 0 |
| 34 | 0 |
| 35 | 0 |
| 36 | 42600007379160 |
[1,-2,8,-10,24,0,280,-676,1632,-1970,0,0,27720, -133844,646256,0,941664,0,10976840,-26500436,0, -154455860,0,0,2173358880,-2623476242,25334527696, -15290740090,73830224208,0,0,-1038870091396, 2508054264192,0,0,0,42600007379160] |