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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -3 |
| 3 | 53 |
| 4 | -4871 |
| 5 | 2262505 |
| 6 | -5269940619 |
| 7 | 61424345593757 |
| 8 | -3580474937256484367 |
| 9 | 1043606492389898678125009 |
| 10 | -1520932783784930699920673828115 |
| 11 | 11082945991224258678496051788222656261 |
| 12 | -403804307486446123171767495567989349951171863 |
[0,1,-3,53,-4871,2262505,-5269940619, 61424345593757,-3580474937256484367, 1043606492389898678125009, -1520932783784930699920673828115, 11082945991224258678496051788222656261, -403804307486446123171767495567989349951171863] |