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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | -7 |
| 3 | 9 |
| 4 | 177 |
| 5 | -3897 |
| 6 | 65649 |
| 7 | -1057851 |
| 8 | 16606977 |
| 9 | -238404789 |
| 10 | 2305262889 |
| 11 | 33442089057 |
| 12 | -3560906733903 |
| 13 | 182521828278351 |
| 14 | -8055082800686367 |
| 15 | 338022326927690397 |
| 16 | -13915405899740874879 |
| 17 | 566988435851123595411 |
| 18 | -22784764731442383689127 |
| 19 | 888283409438427072329529 |
[1,3,-7,9,177,-3897,65649,-1057851,16606977, -238404789,2305262889,33442089057,-3560906733903, 182521828278351,-8055082800686367, 338022326927690397,-13915405899740874879, 566988435851123595411,-22784764731442383689127, 888283409438427072329529] |