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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 56 |
| 7 | 106 |
| 8 | 201 |
| 9 | 382 |
| 10 | 727 |
| 11 | 1385 |
| 12 | 2642 |
| 13 | 5046 |
| 14 | 9653 |
| 15 | 18497 |
| 16 | 35505 |
| 17 | 68264 |
| 18 | 131448 |
| 19 | 253474 |
| 20 | 489434 |
| 21 | 946277 |
| 22 | 1831859 |
| 23 | 3550605 |
| 24 | 6890212 |
| 25 | 13386344 |
| 26 | 26035631 |
| 27 | 50690701 |
| 28 | 98791877 |
| 29 | 192720153 |
| 30 | 376294116 |
| 31 | 735367369 |
| 32 | 1438270520 |
| 33 | 2815264083 |
[1,2,4,8,16,30,56,106,201,382,727,1385,2642,5046, 9653,18497,35505,68264,131448,253474,489434, 946277,1831859,3550605,6890212,13386344,26035631, 50690701,98791877,192720153,376294116,735367369, 1438270520,2815264083] |