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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 29 |
| 6 | 54 |
| 7 | 104 |
| 8 | 195 |
| 9 | 377 |
| 10 | 713 |
| 11 | 1385 |
| 12 | 2639 |
| 13 | 5147 |
| 14 | 9866 |
| 15 | 19304 |
| 16 | 37179 |
| 17 | 72929 |
| 18 | 140997 |
| 19 | 277133 |
| 20 | 537471 |
| 21 | 1058147 |
| 22 | 2057509 |
| 23 | 4056233 |
| 24 | 7904455 |
| 25 | 15600899 |
| 26 | 30458899 |
| 27 | 60174899 |
| 28 | 117675359 |
| 29 | 232676279 |
| 30 | 455657714 |
| 31 | 901620584 |
| 32 | 1767883499 |
| 33 | 3500409329 |
| 34 | 6871173869 |
[1,2,4,8,15,29,54,104,195,377,713,1385,2639,5147, 9866,19304,37179,72929,140997,277133,537471, 1058147,2057509,4056233,7904455,15600899,30458899, 60174899,117675359,232676279,455657714,901620584, 1767883499,3500409329,6871173869] |