The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 11 |
| 7 | 21 |
| 8 | 38 |
| 9 | 71 |
| 10 | 141 |
| 11 | 289 |
| 12 | 591 |
| 13 | 1195 |
| 14 | 2410 |
| 15 | 4897 |
| 16 | 10051 |
| 17 | 20763 |
| 18 | 42996 |
| 19 | 89139 |
| 20 | 185170 |
| 21 | 385809 |
| 22 | 806349 |
| 23 | 1689573 |
| 24 | 3547152 |
| 25 | 7459715 |
| 26 | 15714655 |
| 27 | 33161821 |
| 28 | 70095642 |
| 29 | 148388521 |
| 30 | 314562189 |
| 31 | 667682057 |
| 32 | 1418942341 |
[1,1,1,1,2,5,11,21,38,71,141,289,591,1195,2410, 4897,10051,20763,42996,89139,185170,385809,806349, 1689573,3547152,7459715,15714655,33161821, 70095642,148388521,314562189,667682057,1418942341] |