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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | -1 |
| 4 | -37 |
| 5 | -79 |
| 6 | 281 |
| 7 | 3359 |
| 8 | 5661 |
| 9 | -45341 |
| 10 | -320819 |
| 11 | -273824 |
| 12 | 5978275 |
| 13 | 30439553 |
| 14 | -9213737 |
| 15 | -719524811 |
| 16 | -2714115501 |
| 17 | 5008636187 |
| 18 | 81197252233 |
[0,1,1,-1,-37,-79,281,3359,5661,-45341,-320819, -273824,5978275,30439553,-9213737,-719524811, -2714115501,5008636187,81197252233] |