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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -2 |
| 3 | 9 |
| 4 | -64 |
| 5 | 625 |
| 6 | -7776 |
| 7 | 117649 |
| 8 | -2097152 |
| 9 | 43046721 |
| 10 | -1000000000 |
| 11 | 25937424601 |
| 12 | -743008370688 |
| 13 | 23298085122481 |
| 14 | -793714773254144 |
| 15 | 29192926025390625 |
| 16 | -1152921504606846976 |
| 17 | 48661191875666868481 |
| 18 | -2185911559738696531968 |
| 19 | 104127350297911241532841 |
[1,-2,9,-64,625,-7776,117649,-2097152,43046721, -1000000000,25937424601,-743008370688, 23298085122481,-793714773254144,29192926025390625, -1152921504606846976,48661191875666868481, -2185911559738696531968,104127350297911241532841] |