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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 4 |
| 4 | -4 |
| 5 | 4 |
| 6 | 8 |
| 7 | -20 |
| 8 | 32 |
| 9 | -12 |
| 10 | -40 |
| 11 | 124 |
| 12 | -160 |
| 13 | 68 |
| 14 | 232 |
| 15 | -628 |
| 16 | 816 |
| 17 | -300 |
| 18 | -1160 |
| 19 | 3100 |
| 20 | -3904 |
| 21 | 1380 |
| 22 | 5640 |
| 23 | -14676 |
| 24 | 18256 |
| 25 | -6156 |
| 26 | -26472 |
| 27 | 67900 |
| 28 | -83488 |
| 29 | 27268 |
| 30 | 121640 |
| 31 | -308276 |
| 32 | 375920 |
| 33 | -119532 |
| 34 | -549448 |
| 35 | 1379932 |
| 36 | -1671424 |
| 37 | 520100 |
| 38 | 2449480 |
[1,0,0,4,-4,4,8,-20,32,-12,-40,124,-160,68,232, -628,816,-300,-1160,3100,-3904,1380,5640,-14676, 18256,-6156,-26472,67900,-83488,27268,121640, -308276,375920,-119532,-549448,1379932,-1671424, 520100,2449480] |