The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 32 |
| 2 | 660 |
| 3 | 11200 |
| 4 | 170576 |
| 5 | 2429952 |
| 6 | 33121600 |
| 7 | 437888000 |
| 8 | 5663851776 |
| 9 | 72087887872 |
| 10 | 906450621440 |
| 11 | 11292447129600 |
| 12 | 139666259070976 |
| 13 | 1717603091873792 |
| 14 | 21027551488327680 |
| 15 | 256495170125824000 |
[1,32,660,11200,170576,2429952,33121600,437888000, 5663851776,72087887872,906450621440, 11292447129600,139666259070976,1717603091873792, 21027551488327680,256495170125824000] |