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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 28 |
| 6 | 53 |
| 7 | 102 |
| 8 | 196 |
| 9 | 380 |
| 10 | 734 |
| 11 | 1419 |
| 12 | 2744 |
| 13 | 5308 |
| 14 | 10268 |
| 15 | 19861 |
| 16 | 38416 |
| 17 | 74310 |
| 18 | 143740 |
| 19 | 278041 |
| 20 | 537824 |
| 21 | 1040333 |
| 22 | 2012354 |
| 23 | 3892568 |
| 24 | 7529536 |
| 25 | 14564656 |
| 26 | 28172944 |
| 27 | 54495952 |
| 28 | 105413504 |
| 29 | 203905180 |
[1,2,4,8,14,28,53,102,196,380,734,1419,2744,5308, 10268,19861,38416,74310,143740,278041,537824, 1040333,2012354,3892568,7529536,14564656,28172944, 54495952,105413504,203905180] |