The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 42 |
| 5 | 55440 |
| 6 | 1235520 |
| 7 | 8821612800 |
| 8 | 335221286400 |
| 9 | 7124122778572800 |
| 10 | 221504779785446277120000 |
| 11 | 17166620433372086476800000 |
| 12 | 2210327142511928825790332928000000 |
[1,1,5,42,55440,1235520,8821612800,335221286400, 7124122778572800,221504779785446277120000, 17166620433372086476800000, 2210327142511928825790332928000000] |