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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 56 |
| 7 | 106 |
| 8 | 202 |
| 9 | 386 |
| 10 | 736 |
| 11 | 1406 |
| 12 | 2692 |
| 13 | 5160 |
| 14 | 9914 |
| 15 | 19070 |
| 16 | 36740 |
| 17 | 70902 |
| 18 | 136992 |
| 19 | 265098 |
| 20 | 513640 |
| 21 | 996428 |
| 22 | 1935466 |
| 23 | 3763516 |
| 24 | 7326444 |
| 25 | 14277174 |
| 26 | 27849304 |
| 27 | 54375680 |
| 28 | 106261594 |
| 29 | 207835418 |
| 30 | 406830628 |
| 31 | 796961348 |
| 32 | 1562350552 |
| 33 | 3064905074 |
[1,2,4,8,16,30,56,106,202,386,736,1406,2692,5160, 9914,19070,36740,70902,136992,265098,513640, 996428,1935466,3763516,7326444,14277174,27849304, 54375680,106261594,207835418,406830628,796961348, 1562350552,3064905074] |