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 | 3 |
| 8 | 5 |
| 9 | 11 |
| 10 | 21 |
| 11 | 39 |
| 12 | 109 |
| 13 | 383 |
| 14 | 1291 |
| 15 | 5187 |
| 16 | 19147 |
| 17 | 85163 |
| 18 | 418695 |
| 19 | 2523925 |
| 20 | 15886439 |
| 21 | 116954773 |
| 22 | 866328129 |
[1,1,1,1,1,1,3,5,11,21,39,109,383,1291,5187,19147, 85163,418695,2523925,15886439,116954773,866328129] |