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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 11 |
| 4 | 20 |
| 5 | 33 |
| 6 | 60 |
| 7 | 101 |
| 8 | 182 |
| 9 | 303 |
| 10 | 546 |
| 11 | 911 |
| 12 | 1640 |
| 13 | 2733 |
| 14 | 4920 |
| 15 | 8201 |
| 16 | 14762 |
| 17 | 24603 |
| 18 | 44286 |
| 19 | 73811 |
| 20 | 132860 |
| 21 | 221433 |
| 22 | 398580 |
| 23 | 664301 |
| 24 | 1195742 |
| 25 | 1992903 |
| 26 | 3587226 |
| 27 | 5978711 |
| 28 | 10761680 |
| 29 | 17936133 |
| 30 | 32285040 |
| 31 | 53808401 |
| 32 | 96855122 |
| 33 | 161425203 |
| 34 | 290565366 |
| 35 | 484275611 |
[1,3,6,11,20,33,60,101,182,303,546,911,1640,2733, 4920,8201,14762,24603,44286,73811,132860,221433, 398580,664301,1195742,1992903,3587226,5978711, 10761680,17936133,32285040,53808401,96855122, 161425203,290565366,484275611] |