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 | 5 |
| 9 | 13 |
| 10 | 25 |
| 11 | 47 |
| 12 | 113 |
| 13 | 351 |
| 14 | 1317 |
| 15 | 5315 |
| 16 | 24057 |
| 17 | 110167 |
| 18 | 558903 |
| 19 | 3123765 |
| 20 | 20513901 |
| 21 | 147650027 |
| 22 | 1233473669 |
| 23 | 10827756731 |
[1,1,1,1,1,1,1,5,13,25,47,113,351,1317,5315,24057, 110167,558903,3123765,20513901,147650027, 1233473669,10827756731] |