The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 6 |
| 4 | 11 |
| 5 | 20 |
| 6 | 21 |
| 7 | 22 |
| 8 | 39 |
| 9 | 72 |
| 10 | 137 |
| 11 | 266 |
| 12 | 267 |
| 13 | 524 |
| 14 | 1037 |
| 15 | 2062 |
| 16 | 4111 |
| 17 | 8208 |
| 18 | 16401 |
| 19 | 32786 |
| 20 | 65555 |
| 21 | 65556 |
| 22 | 65557 |
| 23 | 65558 |
| 24 | 131095 |
| 25 | 262168 |
| 26 | 524313 |
| 27 | 1048602 |
| 28 | 2097179 |
| 29 | 4194332 |
| 30 | 8388637 |
| 31 | 16777246 |
| 32 | 33554463 |
| 33 | 67108896 |
[2,5,6,11,20,21,22,39,72,137,266,267,524,1037, 2062,4111,8208,16401,32786,65555,65556,65557, 65558,131095,262168,524313,1048602,2097179, 4194332,8388637,16777246,33554463,67108896] |