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 | 9 |
| 8 | 29 |
| 9 | 49 |
| 10 | 117 |
| 11 | 309 |
| 12 | 1103 |
| 13 | 4069 |
| 14 | 20291 |
| 15 | 72247 |
| 16 | 389841 |
| 17 | 1904157 |
| 18 | 13920727 |
| 19 | 88083783 |
| 20 | 777496329 |
| 21 | 5560593885 |
| 22 | 59069816813 |
[1,1,1,1,1,1,9,29,49,117,309,1103,4069,20291, 72247,389841,1904157,13920727,88083783,777496329, 5560593885,59069816813] |