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 | 1 |
| 2 | 6 |
| 3 | 21 |
| 4 | 55 |
| 5 | 120 |
| 6 | 231 |
| 7 | 406 |
| 8 | 665 |
| 9 | 1035 |
| 10 | 1540 |
| 11 | 2211 |
[0,1,6,21,55,120,231,406,665,1035,1540,2211] |