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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 9 |
| 6 | 44 |
| 7 | 294 |
| 8 | 2893 |
| 9 | 36496 |
| 10 | 545808 |
| 11 | 9029737 |
| 12 | 159563559 |
| 13 | 2952794985 |
| 14 | 56589742050 |
[0,0,0,1,3,9,44,294,2893,36496,545808,9029737, 159563559,2952794985,56589742050] |