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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 4 |
| 5 | -5 |
| 6 | 31 |
| 7 | -45 |
| 8 | -57 |
| 9 | -66 |
| 10 | 1124 |
| 11 | 116 |
| 12 | -8314 |
| 13 | -21328 |
| 14 | 76424 |
| 15 | 229013 |
| 16 | -537885 |
| 17 | -3308391 |
| 18 | 2165589 |
| 19 | 36968501 |
| 20 | 16926113 |
| 21 | -402914677 |
| 22 | -602853397 |
| 23 | 3854818970 |
| 24 | 11099464628 |
| 25 | -31321810278 |
| 26 | -161502827466 |
| 27 | 188659370973 |
| 28 | 2076430792115 |
| 29 | 118544397194 |
| 30 | -23981088656686 |
[1,1,-2,4,-5,31,-45,-57,-66,1124,116,-8314,-21328, 76424,229013,-537885,-3308391,2165589,36968501, 16926113,-402914677,-602853397,3854818970, 11099464628,-31321810278,-161502827466, 188659370973,2076430792115,118544397194, -23981088656686] |