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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 57 |
| 7 | 108 |
| 8 | 205 |
| 9 | 389 |
| 10 | 741 |
| 11 | 1412 |
| 12 | 2693 |
| 13 | 5137 |
| 14 | 9809 |
| 15 | 18746 |
| 16 | 35860 |
| 17 | 68656 |
| 18 | 131562 |
| 19 | 252325 |
| 20 | 484371 |
| 21 | 930640 |
| 22 | 1789672 |
| 23 | 3444700 |
| 24 | 6636143 |
| 25 | 12795719 |
| 26 | 24694302 |
| 27 | 47699004 |
| 28 | 92214561 |
| 29 | 178428336 |
| 30 | 345540036 |
| 31 | 669728403 |
| 32 | 1299152116 |
| 33 | 2522185086 |
[1,2,4,8,16,30,57,108,205,389,741,1412,2693,5137, 9809,18746,35860,68656,131562,252325,484371, 930640,1789672,3444700,6636143,12795719,24694302, 47699004,92214561,178428336,345540036,669728403, 1299152116,2522185086] |