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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 19 |
| 4 | 43 |
| 5 | 94 |
| 6 | 202 |
| 7 | 429 |
| 8 | 905 |
| 9 | 1901 |
| 10 | 3983 |
| 11 | 8332 |
| 12 | 17413 |
| 13 | 36370 |
| 14 | 75938 |
| 15 | 158519 |
| 16 | 330862 |
| 17 | 690523 |
| 18 | 1441082 |
| 19 | 3007369 |
| 20 | 6275917 |
| 21 | 13096737 |
| 22 | 27330418 |
| 23 | 57033206 |
| 24 | 119016808 |
| 25 | 248363751 |
| 26 | 518283950 |
| 27 | 1081551220 |
| 28 | 2256972626 |
| 29 | 4709831964 |
| 30 | 9828437634 |
| 31 | 20509899437 |
| 32 | 42799880699 |
[1,3,8,19,43,94,202,429,905,1901,3983,8332,17413, 36370,75938,158519,330862,690523,1441082,3007369, 6275917,13096737,27330418,57033206,119016808, 248363751,518283950,1081551220,2256972626, 4709831964,9828437634,20509899437,42799880699] |