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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 8 |
| 6 | 13 |
| 7 | 18 |
| 8 | 30 |
| 9 | 46 |
| 10 | 78 |
| 11 | 126 |
| 12 | 224 |
| 13 | 380 |
| 14 | 687 |
| 15 | 1224 |
| 16 | 2250 |
| 17 | 4112 |
| 18 | 7685 |
| 19 | 14310 |
| 20 | 27012 |
| 21 | 50964 |
| 22 | 96909 |
| 23 | 184410 |
| 24 | 352698 |
| 25 | 675188 |
| 26 | 1296858 |
| 27 | 2493726 |
| 28 | 4806078 |
| 29 | 9272780 |
| 30 | 17920860 |
| 31 | 34669602 |
| 32 | 67159050 |
| 33 | 130216124 |
| 34 | 252745368 |
| 35 | 490984488 |
[1,2,3,4,6,8,13,18,30,46,78,126,224,380,687,1224, 2250,4112,7685,14310,27012,50964,96909,184410, 352698,675188,1296858,2493726,4806078,9272780, 17920860,34669602,67159050,130216124,252745368, 490984488] |