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 | 0 |
| 3 | 0 |
| 4 | 3 |
| 5 | 7 |
| 6 | 132 |
| 7 | 3039 |
| 8 | 751770 |
| 9 | 20902434 |
| 10 | 14753635250 |
[1,0,0,3,7,132,3039,751770,20902434,14753635250] |