The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 17 |
| 7 | 37 |
| 8 | 73 |
| 9 | 141 |
| 10 | 273 |
| 11 | 541 |
| 12 | 1065 |
| 13 | 2085 |
| 14 | 4081 |
| 15 | 8013 |
| 16 | 15737 |
| 17 | 30869 |
| 18 | 60545 |
| 19 | 118781 |
| 20 | 233097 |
| 21 | 457317 |
| 22 | 897233 |
| 23 | 1760269 |
| 24 | 3453785 |
| 25 | 6776181 |
| 26 | 13294881 |
| 27 | 26083869 |
| 28 | 51176745 |
| 29 | 100407301 |
| 30 | 196998513 |
| 31 | 386505517 |
| 32 | 758320121 |
| 33 | 1487807381 |
| 34 | 4137567061 |
[1,1,3,5,9,17,37,73,141,273,541,1065,2085,4081, 8013,15737,30869,60545,118781,233097,457317, 897233,1760269,3453785,6776181,13294881,26083869, 51176745,100407301,196998513,386505517,758320121, 1487807381,4137567061] |