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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 5 |
| 3 | 35 |
| 4 | 1961 |
| 5 | 141479 |
| 6 | 15142253 |
| 7 | 2233807883 |
| 8 | 434557324241 |
| 9 | 107785095059663 |
| 10 | 33199576493789525 |
| 11 | 12432680138093402483 |
| 12 | 5562808118039117516921 |
| 13 | 2930877575020377851090039 |
| 14 | 1796013989349400537747402685 |
| 15 | 1266540872143807472738548470875 |
| 16 | 1018406407477050435716016821787041 |
[1,-1,5,35,1961,141479,15142253,2233807883, 434557324241,107785095059663,33199576493789525, 12432680138093402483,5562808118039117516921, 2930877575020377851090039, 1796013989349400537747402685, 1266540872143807472738548470875, 1018406407477050435716016821787041] |