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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | -1 |
| 8 | 59 |
| 9 | -71 |
| 10 | 131 |
| 11 | -53 |
| 12 | 179063 |
| 13 | -152587 |
| 14 | 1711379 |
| 15 | -2976271 |
| 16 | 10956347 |
| 17 | -19341869 |
| 18 | 4868569481 |
| 19 | -13052168197 |
| 20 | 1336857226717 |
| 21 | -150881331703 |
| 22 | 312800427143 |
| 23 | -1994295576001 |
| 24 | 1162545732884416477 |
| 25 | -1066743770616172283 |
| 26 | 982084002016960747 |
| 27 | -1813863044243307923 |
[1,1,1,1,1,1,3,-1,59,-71,131,-53,179063,-152587, 1711379,-2976271,10956347,-19341869,4868569481, -13052168197,1336857226717,-150881331703, 312800427143,-1994295576001,1162545732884416477, -1066743770616172283,982084002016960747, -1813863044243307923] |