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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 19 |
| 6 | 39 |
| 7 | 76 |
| 8 | 150 |
| 9 | 301 |
| 10 | 600 |
| 11 | 1191 |
| 12 | 2370 |
| 13 | 4721 |
| 14 | 9396 |
| 15 | 18696 |
| 16 | 37212 |
| 17 | 74069 |
| 18 | 147417 |
| 19 | 293398 |
| 20 | 583956 |
| 21 | 1162257 |
| 22 | 2313237 |
| 23 | 4604037 |
| 24 | 9163443 |
| 25 | 18238042 |
| 26 | 36299229 |
| 27 | 72246487 |
| 28 | 143792475 |
| 29 | 286190708 |
| 30 | 569606421 |
| 31 | 1133689810 |
| 32 | 2256387135 |
| 33 | 4490895817 |
| 34 | 8938246848 |
[0,1,3,5,9,19,39,76,150,301,600,1191,2370,4721, 9396,18696,37212,74069,147417,293398,583956, 1162257,2313237,4604037,9163443,18238042,36299229, 72246487,143792475,286190708,569606421,1133689810, 2256387135,4490895817,8938246848] |