The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -3 |
| 3 | 37 |
| 4 | -679 |
| 5 | 17161 |
| 6 | -553451 |
| 7 | 21731053 |
| 8 | -1006118863 |
| 9 | 53671172113 |
| 10 | -3241671266899 |
| 11 | 218677223408821 |
| 12 | -16296163119155063 |
| 13 | 1329568681331536153 |
| 14 | -117874745761237043515 |
| 15 | 11283758432396431997821 |
| 16 | -1159952212029532257663391 |
| 17 | 127445385808282289840496673 |
[1,1,-3,37,-679,17161,-553451,21731053, -1006118863,53671172113,-3241671266899, 218677223408821,-16296163119155063, 1329568681331536153,-117874745761237043515, 11283758432396431997821, -1159952212029532257663391, 127445385808282289840496673] |