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 | 1 |
| 3 | 0 |
| 4 | 5 |
| 5 | 15 |
| 6 | 0 |
| 7 | 55 |
| 8 | 85 |
| 9 | 0 |
| 10 | 325 |
| 11 | 1023 |
| 12 | 0 |
| 13 | 3786 |
| 14 | 4678 |
| 15 | 0 |
| 16 | 21809 |
[1,1,0,5,15,0,55,85,0,325,1023,0,3786,4678,0, 21809] |