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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -7 |
| 2 | -70 |
| 3 | -795 |
| 4 | -13802 |
| 5 | -277782 |
| 6 | -6093708 |
| 7 | -139376659 |
| 8 | -3297234754 |
| 9 | -79988099074 |
| 10 | -1979248977748 |
| 11 | -49758116194846 |
| 12 | -1267321717299236 |
| 13 | -32631825106297228 |
| 14 | -848030793254951704 |
| 15 | -22214311484843607811 |
| 16 | -585938143786366837938 |
| 17 | -15548874443787002057610 |
| 18 | -414829266882771282611204 |
| 19 | -11120089118043870668697578 |
| 20 | -299364678394845043715844268 |
| 21 | -8090271856987498430846360564 |
[1,-7,-70,-795,-13802,-277782,-6093708,-139376659, -3297234754,-79988099074,-1979248977748, -49758116194846,-1267321717299236, -32631825106297228,-848030793254951704, -22214311484843607811,-585938143786366837938, -15548874443787002057610, -414829266882771282611204, -11120089118043870668697578, -299364678394845043715844268, -8090271856987498430846360564] |