The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 32 |
| 3 | 756 |
| 4 | 57008 |
| 5 | 14053392 |
| 6 | 11549010240 |
| 7 | 32284463059856 |
| 8 | 312975732247964288 |
| 9 | 10703164992206736756608 |
| 10 | 1309922159165846642159232512 |
| 11 | 580548577042594102886390324391168 |
[1,4,32,756,57008,14053392,11549010240, 32284463059856,312975732247964288, 10703164992206736756608, 1309922159165846642159232512, 580548577042594102886390324391168] |