The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | -44 |
| 3 | 2166 |
| 4 | -196888 |
| 5 | 28730410 |
| 6 | -6148123332 |
| 7 | 1813990148894 |
| 8 | -705775346640176 |
| 9 | 350112935442888018 |
| 10 | -215681051222514096220 |
| 11 | 161537815119247080938182 |
| 12 | -144555133640020128085896264 |
| 13 | 152323571317104251881943249786 |
[0,2,-44,2166,-196888,28730410,-6148123332, 1813990148894,-705775346640176,350112935442888018, -215681051222514096220,161537815119247080938182, -144555133640020128085896264, 152323571317104251881943249786] |