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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 0 |
| 4 | -8 |
| 5 | 0 |
| 6 | 96 |
| 7 | 0 |
| 8 | -2176 |
| 9 | 0 |
| 10 | 79360 |
| 11 | 0 |
| 12 | -4245504 |
| 13 | 0 |
| 14 | 313155584 |
| 15 | 0 |
| 16 | -30460116992 |
| 17 | 0 |
| 18 | 3777576173568 |
| 19 | 0 |
| 20 | -581777702256640 |
| 21 | 0 |
| 22 | 108932957168730112 |
| 23 | 0 |
| 24 | -24370173276164456448 |
| 25 | 0 |
| 26 | 6419958484945407574016 |
| 27 | 0 |
| 28 | -1967044844910430876860416 |
| 29 | 0 |
| 30 | 693575525634287935244206080 |
| 31 | 0 |
[0,1,2,0,-8,0,96,0,-2176,0,79360,0,-4245504,0, 313155584,0,-30460116992,0,3777576173568,0, -581777702256640,0,108932957168730112,0, -24370173276164456448,0,6419958484945407574016,0, -1967044844910430876860416,0, 693575525634287935244206080,0] |