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 | 4 |
| 3 | 17 |
| 4 | 74 |
| 5 | 335 |
| 6 | 1566 |
| 7 | 7515 |
| 8 | 36836 |
| 9 | 183709 |
| 10 | 929392 |
| 11 | 4758477 |
| 12 | 24611950 |
| 13 | 128411643 |
| 14 | 675051770 |
| 15 | 3572165431 |
| 16 | 19012868648 |
| 17 | 101718917721 |
| 18 | 546707554844 |
| 19 | 2950563205705 |
| 20 | 15983712882930 |
| 21 | 86880753686279 |
| 22 | 473710078493718 |
| 23 | 2590187432233363 |
| 24 | 14199709022579788 |
[1,4,17,74,335,1566,7515,36836,183709,929392, 4758477,24611950,128411643,675051770,3572165431, 19012868648,101718917721,546707554844, 2950563205705,15983712882930,86880753686279, 473710078493718,2590187432233363, 14199709022579788] |