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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 26 |
| 6 | 54 |
| 7 | 108 |
| 8 | 219 |
| 9 | 439 |
| 10 | 882 |
| 11 | 1766 |
| 12 | 3539 |
| 13 | 7081 |
| 14 | 14172 |
| 15 | 28351 |
| 16 | 56716 |
| 17 | 113443 |
| 18 | 226908 |
| 19 | 453833 |
| 20 | 907698 |
| 21 | 1815424 |
| 22 | 3630893 |
| 23 | 7261829 |
| 24 | 14523725 |
| 25 | 29047513 |
| 26 | 58095121 |
| 27 | 116190338 |
| 28 | 232380810 |
| 29 | 464761759 |
| 30 | 929523710 |
| 31 | 1859047619 |
| 32 | 3718095507 |
| 33 | 7436191301 |
[1,1,3,6,13,26,54,108,219,439,882,1766,3539,7081, 14172,28351,56716,113443,226908,453833,907698, 1815424,3630893,7261829,14523725,29047513, 58095121,116190338,232380810,464761759,929523710, 1859047619,3718095507,7436191301] |