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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 15 |
| 7 | 27 |
| 8 | 48 |
| 9 | 84 |
| 10 | 147 |
| 11 | 257 |
| 12 | 451 |
| 13 | 796 |
| 14 | 1413 |
| 15 | 2526 |
| 16 | 4544 |
| 17 | 8226 |
| 18 | 14978 |
| 19 | 27417 |
| 20 | 50434 |
| 21 | 93183 |
| 22 | 172865 |
| 23 | 321857 |
| 24 | 601263 |
| 25 | 1126644 |
| 26 | 2116968 |
| 27 | 3987960 |
| 28 | 7530200 |
| 29 | 14249649 |
| 30 | 27019301 |
| 31 | 51327965 |
| 32 | 97676156 |
| 33 | 186177568 |
| 34 | 355406479 |
| 35 | 679425009 |
[1,1,1,2,4,8,15,27,48,84,147,257,451,796,1413, 2526,4544,8226,14978,27417,50434,93183,172865, 321857,601263,1126644,2116968,3987960,7530200, 14249649,27019301,51327965,97676156,186177568, 355406479,679425009] |