| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | -21 |
| 7 | 903 |
| 8 | -25585 |
| 9 | 875007 |
| 10 | -27125217 |
| 11 | 882215391 |
| 12 | -28005209505 |
| 13 | 899790907743 |
| 14 | -28735427761313 |
| 15 | 920460637644639 |
| 16 | -29439916001972385 |
| 17 | 942314556807454559 |
| 18 | -30150270336284213409 |
| 19 | 964869381941043396447 |
| 20 | -30874848551033891160225 |
[1,-21,903,-25585,875007,-27125217,882215391, -28005209505,899790907743,-28735427761313, 920460637644639,-29439916001972385, 942314556807454559,-30150270336284213409, 964869381941043396447,-30874848551033891160225] |