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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 71 |
| 3 | -1625 |
| 4 | -41999 |
| 5 | 91013 |
| 6 | 21762679 |
| 7 | 229399183 |
| 8 | -11947008415 |
| 9 | -335160068867 |
| 10 | 6180180526759 |
| 11 | 408799214337527 |
| 12 | -1347844821458351 |
| 13 | -498269858739890315 |
| 14 | -4760353861080634921 |
| 15 | 621741645997081258207 |
| 16 | 15080361573750589690561 |
[1,13,71,-1625,-41999,91013,21762679,229399183, -11947008415,-335160068867,6180180526759, 408799214337527,-1347844821458351, -498269858739890315,-4760353861080634921, 621741645997081258207,15080361573750589690561] |