The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -16 |
| 2 | 440 |
| 3 | -25856 |
| 4 | 2702368 |
| 5 | -442400000 |
| 6 | 104680527744 |
| 7 | -33826438987776 |
| 8 | 14318658795815424 |
| 9 | -7689929339111084032 |
| 10 | 5108988246588765059072 |
| 11 | -4113772753950316528205824 |
| 12 | 3947181962951541949825294336 |
[2,-16,440,-25856,2702368,-442400000,104680527744, -33826438987776,14318658795815424, -7689929339111084032,5108988246588765059072, -4113772753950316528205824, 3947181962951541949825294336] |