The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3674160 |
| 3 | 88580102706155225088000 |
| 4 | 707195371192426622240452051915172831683411968000000000 |
| 5 | 5289239086872492808525454741861751983960246149231077646632506991757159229816832000000000000000 |
[1,3674160,88580102706155225088000, 70719537119242662224045205191517283168341196800000\ 0000, 52892390868724928085254547418617519839602461492310\ 77646632506991757159229816832000000000000000] |