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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -2 |
| 3 | -17 |
| 4 | 10 |
| 5 | 976 |
| 6 | 3736 |
| 7 | -106910 |
| 8 | -1386020 |
| 9 | 15470380 |
| 10 | 562409596 |
| 11 | -722342444 |
| 12 | -275109171776 |
| 13 | -2700252315656 |
| 14 | 152965123673272 |
| 15 | 4156435296446896 |
| 16 | -80740805437063664 |
| 17 | -5565174444376872368 |
| 18 | 6196702378365183952 |
| 19 | 7539582040570866254032 |
[1,1,-2,-17,10,976,3736,-106910,-1386020,15470380, 562409596,-722342444,-275109171776,-2700252315656, 152965123673272,4156435296446896, -80740805437063664,-5565174444376872368, 6196702378365183952,7539582040570866254032] |