The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 11 |
| 5 | 26 |
| 6 | 50 |
| 7 | 52 |
| 8 | 146 |
| 9 | 154 |
| 10 | 256 |
| 11 | 518 |
| 12 | 602 |
| 13 | 2884 |
| 14 | 9508 |
| 15 | 10523 |
| 16 | 19649 |
| 17 | 32507 |
| 18 | 79444 |
[2,4,8,11,26,50,52,146,154,256,518,602,2884,9508, 10523,19649,32507,79444] |