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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 19 |
| 4 | -207 |
| 5 | 3331 |
| 6 | -71223 |
| 7 | 1890379 |
| 8 | -59652687 |
| 9 | 2175761971 |
| 10 | -89953773543 |
| 11 | 4155502117339 |
| 12 | -212122704251967 |
| 13 | 11857607972675011 |
| 14 | -720435277883199063 |
| 15 | 47273215180877201899 |
| 16 | -3331797538738820992047 |
| 17 | 251025685429022007354451 |
| 18 | -20133640365773761748643783 |
| 19 | 1712740622904757368673592059 |
[1,-3,19,-207,3331,-71223,1890379,-59652687, 2175761971,-89953773543,4155502117339, -212122704251967,11857607972675011, -720435277883199063,47273215180877201899, -3331797538738820992047,251025685429022007354451, -20133640365773761748643783, 1712740622904757368673592059] |