The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 4 |
| 3 | -178 |
| 4 | -5336 |
| 5 | 121082 |
| 6 | 24994924 |
| 7 | 661822982 |
| 8 | -273928948016 |
| 9 | -42186434881678 |
| 10 | 4278599785289044 |
| 11 | 2873614390992176702 |
| 12 | 193732299468570630904 |
| 13 | -268774878028807800675478 |
| 14 | -95724942960306213127796036 |
[0,2,4,-178,-5336,121082,24994924,661822982, -273928948016,-42186434881678,4278599785289044, 2873614390992176702,193732299468570630904, -268774878028807800675478, -95724942960306213127796036] |