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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 12 |
| 7 | 19 |
| 8 | 30 |
| 9 | 67 |
| 10 | 102 |
| 11 | 211 |
| 12 | 340 |
| 13 | 722 |
| 14 | 1146 |
| 15 | 2329 |
| 16 | 3992 |
| 17 | 8423 |
| 18 | 14010 |
| 19 | 29281 |
| 20 | 49682 |
| 21 | 105893 |
| 22 | 180016 |
| 23 | 378928 |
| 24 | 654049 |
| 25 | 1385920 |
| 26 | 2387358 |
| 27 | 5069466 |
| 28 | 8820563 |
| 29 | 18782814 |
| 30 | 32732736 |
| 31 | 69445570 |
| 32 | 121964573 |
| 33 | 259680216 |
[1,2,2,4,7,12,19,30,67,102,211,340,722,1146,2329, 3992,8423,14010,29281,49682,105893,180016,378928, 654049,1385920,2387358,5069466,8820563,18782814, 32732736,69445570,121964573,259680216] |