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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 3472 |
| 6 | 43176 |
| 7 | 718704 |
| 8 | 7302603 |
| 9 | 53649456 |
| 10 | 273963144 |
| 11 | 748966224 |
| 12 | -6551114640 |
| 13 | -160183917936 |
| 14 | -2262852226264 |
| 15 | -25565623067152 |
| 16 | -240487533289836 |
| 17 | -1840197404024784 |
| 18 | -10408152419469112 |
| 19 | -19967067469286448 |
| 20 | 539881575330718208 |
| 21 | 10978531155684159696 |
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