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) |
|---|---|
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 15 |
| 8 | 21 |
| 9 | 25 |
| 10 | 27 |
| 11 | 27 |
| 12 | 25 |
| 13 | 21 |
| 14 | 15 |
| 15 | 10 |
| 16 | 6 |
| 17 | 3 |
| 18 | 1 |
[1,3,6,10,15,21,25,27,27,25,21,15,10,6,3,1] |