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 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 7 |
| 10 | 13 |
| 11 | 27 |
| 12 | 41 |
| 13 | 115 |
| 14 | 303 |
| 15 | 1555 |
| 16 | 4709 |
| 17 | 23865 |
| 18 | 76741 |
| 19 | 449473 |
| 20 | 1923409 |
| 21 | 15857735 |
| 22 | 84725491 |
[1,1,1,1,1,1,1,1,7,13,27,41,115,303,1555,4709, 23865,76741,449473,1923409,15857735,84725491] |