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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | -217 |
| 3 | -3505 |
| 4 | 140017 |
| 5 | 4092925 |
| 6 | -148955945 |
| 7 | -6687706825 |
| 8 | 218892836705 |
| 9 | 14041864596725 |
| 10 | -406539275359865 |
| 11 | -36014008700873825 |
| 12 | 902137507503591505 |
| 13 | 109095368804855545325 |
| 14 | -2292647754582021148105 |
| 15 | -381078348283760693301625 |
| 16 | 6416919607713933301113025 |
[1,5,-217,-3505,140017,4092925,-148955945, -6687706825,218892836705,14041864596725, -406539275359865,-36014008700873825, 902137507503591505,109095368804855545325, -2292647754582021148105,-381078348283760693301625, 6416919607713933301113025] |