The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 978 |
| 4 | 7885536 |
| 5 | 1030690752000 |
| 6 | 2681594035175055000 |
| 7 | 111102459342780333711432912 |
| 8 | 82765346051371433995689422809152600 |
| 9 | 984929152509556378339959477248973638627262816 |
| 10 | 201525938526971993585665495909682003042353826154218776128 |
[1,1,3,978,7885536,1030690752000, 2681594035175055000,111102459342780333711432912, 82765346051371433995689422809152600, 984929152509556378339959477248973638627262816, 20152593852697199358566549590968200304235382615421\ 8776128] |