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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 7 |
| 4 | -37 |
| 5 | 338 |
| 6 | -2816 |
| 7 | 28418 |
| 8 | -340334 |
| 9 | 5015080 |
| 10 | -84244704 |
| 11 | 1536606168 |
| 12 | -29753884392 |
| 13 | 609895549872 |
| 14 | -13243687082016 |
| 15 | 305507366834832 |
| 16 | -7523621131117296 |
| 17 | 198844500026698752 |
| 18 | -5649686902983730560 |
| 19 | 171839087043420258432 |
| 20 | -5545292300345590210944 |
[1,0,7,-37,338,-2816,28418,-340334,5015080, -84244704,1536606168,-29753884392,609895549872, -13243687082016,305507366834832,-7523621131117296, 198844500026698752,-5649686902983730560, 171839087043420258432,-5545292300345590210944] |