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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | -25 |
| 2 | -35 |
| 3 | -117 |
| 4 | -279 |
| 5 | -757 |
| 6 | -1955 |
| 7 | -5145 |
| 8 | -13443 |
| 9 | -35221 |
| 10 | -92183 |
| 11 | -241365 |
| 12 | -631875 |
| 13 | -1654297 |
| 14 | -4330979 |
| 15 | -11338677 |
| 16 | -29685015 |
| 17 | -77716405 |
| 18 | -203464163 |
| 19 | -532676121 |
| 20 | -1394564163 |
| 21 | -3651016405 |
| 22 | -9558485015 |
| 23 | -25024438677 |
| 24 | -65514830979 |
| 25 | -171520054297 |
[3,-25,-35,-117,-279,-757,-1955,-5145,-13443, -35221,-92183,-241365,-631875,-1654297,-4330979, -11338677,-29685015,-77716405,-203464163, -532676121,-1394564163,-3651016405,-9558485015, -25024438677,-65514830979,-171520054297] |