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 | 2 |
| 3 | 6 |
| 4 | 18 |
| 5 | 12 |
| 6 | 24 |
| 7 | 456 |
| 8 | 5664 |
| 9 | 20640 |
| 10 | 576 |
| 11 | 120 |
| 12 | 13560 |
| 13 | 1395840 |
[1,2,6,18,12,24,456,5664,20640,576,120,13560, 1395840] |