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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -2 |
| 3 | -13 |
| 4 | -34 |
| 5 | -214 |
| 6 | -1080 |
| 7 | -17748 |
| 8 | -210687 |
| 9 | -12958931 |
| 10 | -336158195 |
| 11 | -90749332418 |
| 12 | -5514826306078 |
| 13 | -6602085964032676 |
| 14 | -1100107197850536319 |
| 15 | -5281354412162659396395 |
| 16 | -2833757368893623973093411 |
| 17 | -48664369321649964841252244730 |
[0,1,-2,-13,-34,-214,-1080,-17748,-210687, -12958931,-336158195,-90749332418,-5514826306078, -6602085964032676,-1100107197850536319, -5281354412162659396395, -2833757368893623973093411, -48664369321649964841252244730] |