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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 22 |
| 7 | 43 |
| 8 | 97 |
| 9 | 211 |
| 10 | 481 |
| 11 | 1090 |
| 12 | 2535 |
| 13 | 5870 |
| 14 | 13774 |
| 15 | 32383 |
| 16 | 76607 |
| 17 | 181709 |
| 18 | 432865 |
| 19 | 1033657 |
| 20 | 2475869 |
| 21 | 5943440 |
| 22 | 14300623 |
| 23 | 34475031 |
| 24 | 83266498 |
| 25 | 201441441 |
| 26 | 488098768 |
| 27 | 1184353854 |
| 28 | 2877625762 |
| 29 | 7000359245 |
| 30 | 17049321176 |
[0,1,2,3,6,10,22,43,97,211,481,1090,2535,5870, 13774,32383,76607,181709,432865,1033657,2475869, 5943440,14300623,34475031,83266498,201441441, 488098768,1184353854,2877625762,7000359245, 17049321176] |