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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -1246 |
| 3 | -7492 |
| 4 | 4657516 |
| 5 | 46775032 |
| 6 | -29015924936 |
| 7 | -408844589872 |
| 8 | 253071654010256 |
| 9 | 4594589206740512 |
| 10 | -2837866929201898976 |
| 11 | -63108098942660197952 |
| 12 | 38894454078640790524096 |
| 13 | 1024410392297184550328192 |
| 14 | -629986057993318476915903616 |
| 15 | -19187153981187366584575167232 |
[1,2,-1246,-7492,4657516,46775032,-29015924936, -408844589872,253071654010256,4594589206740512, -2837866929201898976,-63108098942660197952, 38894454078640790524096,1024410392297184550328192, -629986057993318476915903616, -19187153981187366584575167232] |