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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 11 |
| 7 | 23 |
| 8 | 44 |
| 9 | 90 |
| 10 | 137 |
| 11 | 295 |
| 12 | 602 |
| 13 | 1209 |
| 14 | 2422 |
| 15 | 4845 |
| 16 | 9688 |
| 17 | 19378 |
| 18 | 29069 |
| 19 | 62981 |
| 20 | 128385 |
| 21 | 257983 |
| 22 | 516573 |
| 23 | 1033453 |
| 24 | 2067064 |
| 25 | 4134175 |
| 26 | 8268396 |
| 27 | 16536813 |
| 28 | 33073638 |
| 29 | 66147281 |
| 30 | 132294566 |
| 31 | 264589133 |
| 32 | 529178264 |
| 33 | 1058356530 |
[1,3,1,2,6,11,23,44,90,137,295,602,1209,2422,4845, 9688,19378,29069,62981,128385,257983,516573, 1033453,2067064,4134175,8268396,16536813,33073638, 66147281,132294566,264589133,529178264,1058356530] |