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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -5 |
| 3 | -70 |
| 4 | 1275 |
| 5 | 97748 |
| 6 | -2713585 |
| 7 | -251983958 |
| 8 | 9651414311 |
| 9 | 1137214908700 |
| 10 | -268100912462097 |
| 11 | -16553358418854560 |
| 12 | 4303513869962179379 |
| 13 | 602501593820064477686 |
| 14 | -50199332236439321779977 |
| 15 | -7847812115804566640572424 |
| 16 | 2754406130856424049914030863 |
[1,2,-5,-70,1275,97748,-2713585,-251983958, 9651414311,1137214908700,-268100912462097, -16553358418854560,4303513869962179379, 602501593820064477686,-50199332236439321779977, -7847812115804566640572424, 2754406130856424049914030863] |