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 | 5 |
| 1 | 5 |
| 2 | 20 |
| 3 | 60 |
| 4 | 210 |
| 5 | 690 |
| 6 | 3330 |
[5,5,20,60,210,690,3330] |