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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 26 |
| 6 | 43 |
| 7 | 72 |
| 8 | 129 |
| 9 | 250 |
| 10 | 506 |
| 11 | 1024 |
| 12 | 2016 |
| 13 | 3824 |
| 14 | 7011 |
| 15 | 12592 |
| 16 | 22661 |
| 17 | 42042 |
| 18 | 82384 |
| 19 | 171704 |
| 20 | 375386 |
| 21 | 840092 |
| 22 | 1881584 |
| 23 | 4153824 |
| 24 | 8964736 |
| 25 | 18852992 |
| 26 | 38629504 |
| 27 | 77259008 |
| 28 | 151303440 |
| 29 | 291370976 |
[1,2,4,8,15,26,43,72,129,250,506,1024,2016,3824, 7011,12592,22661,42042,82384,171704,375386,840092, 1881584,4153824,8964736,18852992,38629504, 77259008,151303440,291370976] |