The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 8 |
| 5 | 9 |
| 6 | 18 |
| 7 | 20 |
| 8 | 26 |
| 9 | 111 |
| 10 | 141 |
| 11 | 162 |
| 12 | 236 |
| 13 | 312 |
| 14 | 383 |
| 15 | 2093 |
| 16 | 3926 |
| 17 | 3981 |
| 18 | 4935 |
| 19 | 17126 |
| 20 | 32070 |
| 21 | 64608 |
| 22 | 86802 |
[2,3,5,8,9,18,20,26,111,141,162,236,312,383,2093, 3926,3981,4935,17126,32070,64608,86802] |