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 | 8 |
| 3 | 21 |
| 4 | 56 |
| 5 | 151 |
| 6 | 410 |
| 7 | 1114 |
| 8 | 3027 |
| 9 | 8227 |
| 10 | 22362 |
| 11 | 60785 |
| 12 | 165230 |
| 13 | 449141 |
| 14 | 1220891 |
| 15 | 3318725 |
| 16 | 9021229 |
| 17 | 24522242 |
| 18 | 66658364 |
| 19 | 181196219 |
| 20 | 492542389 |
| 21 | 1338869025 |
| 22 | 3639423341 |
| 23 | 9892978333 |
| 24 | 26891903231 |
| 25 | 73099771885 |
| 26 | 198705781579 |
[1,3,8,21,56,151,410,1114,3027,8227,22362,60785, 165230,449141,1220891,3318725,9021229,24522242, 66658364,181196219,492542389,1338869025, 3639423341,9892978333,26891903231,73099771885, 198705781579] |