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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 12 |
| 3 | 61 |
| 4 | 354 |
| 5 | 2220 |
| 6 | 14649 |
| 7 | 100218 |
| 8 | 704373 |
| 9 | 5055383 |
| 10 | 36895221 |
| 11 | 272975652 |
| 12 | 2042782905 |
| 13 | 15434838759 |
| 14 | 117588475377 |
| 15 | 902259691317 |
| 16 | 6966487019220 |
| 17 | 54086849181609 |
| 18 | 421986564474946 |
| 19 | 3306818224272945 |
| 20 | 26015737668878523 |
| 21 | 205405810986995869 |
| 22 | 1627042895593132485 |
[1,3,12,61,354,2220,14649,100218,704373,5055383, 36895221,272975652,2042782905,15434838759, 117588475377,902259691317,6966487019220, 54086849181609,421986564474946,3306818224272945, 26015737668878523,205405810986995869, 1627042895593132485] |