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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | -15 |
| 4 | -164 |
| 5 | 4245 |
| 6 | 46386 |
| 7 | -4901939 |
| 8 | 39141656 |
| 9 | 11707820361 |
| 10 | -671114863610 |
| 11 | -29398709945319 |
| 12 | 7385525824325364 |
| 13 | -307076643365636963 |
| 14 | -73748845974115224262 |
| 15 | 14299745046516639280005 |
| 16 | -237996466462017367478864 |
| 17 | -377740669670216316717155055 |
| 18 | 75515477307532501838072029326 |
[1,1,2,-15,-164,4245,46386,-4901939,39141656, 11707820361,-671114863610,-29398709945319, 7385525824325364,-307076643365636963, -73748845974115224262,14299745046516639280005, -237996466462017367478864, -377740669670216316717155055, 75515477307532501838072029326] |