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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -5 |
| 2 | -11 |
| 3 | 415 |
| 4 | 1705 |
| 5 | -120125 |
| 6 | -737891 |
| 7 | 73544935 |
| 8 | 602197585 |
| 9 | -77251102325 |
| 10 | -790660144571 |
| 11 | 123981052932655 |
| 12 | 1522721707926265 |
| 13 | -282190333761783725 |
| 14 | -4043468004740204051 |
| 15 | 864617687280807347575 |
| 16 | 14158848206836206915745 |
| 17 | -3431276846283480837508325 |
[1,-5,-11,415,1705,-120125,-737891,73544935, 602197585,-77251102325,-790660144571, 123981052932655,1522721707926265, -282190333761783725,-4043468004740204051, 864617687280807347575,14158848206836206915745, -3431276846283480837508325] |