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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -255 |
| 3 | -6560 |
| 4 | -65535 |
| 5 | -390624 |
| 6 | -1679615 |
| 7 | -5764800 |
| 8 | -16777215 |
| 9 | -43046720 |
| 10 | -99999999 |
| 11 | -214358880 |
| 12 | -429981695 |
| 13 | -815730720 |
| 14 | -1475789055 |
| 15 | -2562890624 |
| 16 | -4294967295 |
| 17 | -6975757440 |
| 18 | -11019960575 |
| 19 | -16983563040 |
| 20 | -25599999999 |
| 21 | -37822859360 |
| 22 | -54875873535 |
[1,0,-255,-6560,-65535,-390624,-1679615,-5764800, -16777215,-43046720,-99999999,-214358880, -429981695,-815730720,-1475789055,-2562890624, -4294967295,-6975757440,-11019960575,-16983563040, -25599999999,-37822859360,-54875873535] |