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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | -62 |
| 7 | 315 |
| 8 | -1002 |
| 9 | 2505 |
| 10 | -5377 |
| 11 | 10373 |
| 12 | -18544 |
| 13 | 32086 |
| 14 | -60468 |
| 15 | 154687 |
| 16 | -567986 |
| 17 | 2422043 |
| 18 | -10225382 |
| 19 | 40740231 |
| 20 | -152497274 |
| 21 | 539809668 |
| 22 | -1822828757 |
| 23 | 5928049329 |
| 24 | -18782176673 |
| 25 | 58918636670 |
| 26 | -187382010256 |
[1,1,1,1,1,1,-62,315,-1002,2505,-5377,10373, -18544,32086,-60468,154687,-567986,2422043, -10225382,40740231,-152497274,539809668, -1822828757,5928049329,-18782176673,58918636670, -187382010256] |