The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 66 |
| 3 | 85200 |
| 4 | 183250434809856 |
| 5 | 1823313150135576711941779566275453880631296 |
| 6 | 1796015231442383417566549899388909415521140128662444489798112174969514654167314109511319978572879992886003172220405085684891648 |
[6,66,85200,183250434809856, 1823313150135576711941779566275453880631296, 17960152314423834175665498993889094155211401286624\ 44489798112174969514654167314109511319978572879992\ 886003172220405085684891648] |