The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 5 |
| 3 | 9 |
| 4 | 14 |
| 5 | 25 |
| 6 | 45 |
| 7 | 77 |
| 8 | 141 |
| 9 | 261 |
| 10 | 505 |
| 11 | 935 |
| 12 | 1849 |
| 13 | 3445 |
| 14 | 6865 |
| 15 | 12885 |
| 16 | 25741 |
| 17 | 48637 |
| 18 | 97241 |
| 19 | 184775 |
| 20 | 369513 |
| 21 | 705453 |
| 22 | 1410865 |
| 23 | 2704179 |
| 24 | 5408313 |
| 25 | 10400625 |
| 26 | 20801201 |
| 27 | 40116627 |
| 28 | 80233201 |
| 29 | 155117549 |
| 30 | 310235041 |
| 31 | 601080421 |
| 32 | 1202160781 |
| 33 | 2333606253 |
| 34 | 4667212441 |
[3,3,5,9,14,25,45,77,141,261,505,935,1849,3445, 6865,12885,25741,48637,97241,184775,369513,705453, 1410865,2704179,5408313,10400625,20801201, 40116627,80233201,155117549,310235041,601080421, 1202160781,2333606253,4667212441] |