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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | -3 |
| 4 | -92 |
| 5 | -1015 |
| 6 | -8274 |
| 7 | -35483 |
| 8 | 496280 |
| 9 | 18127377 |
| 10 | 344895130 |
| 11 | 4427896781 |
| 12 | 15653147412 |
| 13 | -1300426685831 |
| 14 | -53961316375498 |
| 15 | -1345994948213355 |
| 16 | -20836853905979984 |
| 17 | 60576513730122017 |
| 18 | 19579099820703961266 |
| 19 | 894668319876527296669 |
| 20 | 26059066415716831363820 |
[1,1,2,-3,-92,-1015,-8274,-35483,496280,18127377, 344895130,4427896781,15653147412,-1300426685831, -53961316375498,-1345994948213355, -20836853905979984,60576513730122017, 19579099820703961266,894668319876527296669, 26059066415716831363820] |