The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 14 |
| 7 | 26 |
| 8 | 42 |
| 9 | 56 |
| 10 | 152 |
| 11 | 302 |
| 12 | 594 |
| 13 | 1160 |
| 14 | 2210 |
| 15 | 3978 |
| 16 | 6340 |
| 17 | 8550 |
| 18 | 23438 |
| 19 | 46874 |
| 20 | 93738 |
| 21 | 187448 |
| 22 | 374786 |
| 23 | 749130 |
| 24 | 1496644 |
| 25 | 2989158 |
| 26 | 5961218 |
| 27 | 11852136 |
| 28 | 23423224 |
| 29 | 45724590 |
| 30 | 86984606 |
| 31 | 156507206 |
| 32 | 249453030 |
| 33 | 336437636 |
| 34 | 922328300 |
[1,2,3,4,6,14,26,42,56,152,302,594,1160,2210,3978, 6340,8550,23438,46874,93738,187448,374786,749130, 1496644,2989158,5961218,11852136,23423224, 45724590,86984606,156507206,249453030,336437636, 922328300] |