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 | 2 |
| 2 | 4 |
| 3 | 10 |
| 4 | 26 |
| 5 | 66 |
| 6 | 184 |
| 7 | 472 |
| 8 | 1268 |
| 9 | 3340 |
| 10 | 8748 |
| 11 | 22772 |
| 12 | 59102 |
| 13 | 151590 |
| 14 | 386830 |
| 15 | 983914 |
| 16 | 2489384 |
| 17 | 6263284 |
| 18 | 15703204 |
| 19 | 39221884 |
| 20 | 97498736 |
| 21 | 241538472 |
| 22 | 596115898 |
| 23 | 1465958522 |
| 24 | 3595196600 |
| 25 | 8788765304 |
| 26 | 21421616934 |
| 27 | 52080152238 |
| 28 | 126268822824 |
| 29 | 305365334180 |
| 30 | 736770528064 |
[1,2,4,10,26,66,184,472,1268,3340,8748,22772, 59102,151590,386830,983914,2489384,6263284, 15703204,39221884,97498736,241538472,596115898, 1465958522,3595196600,8788765304,21421616934, 52080152238,126268822824,305365334180, 736770528064] |