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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 9 |
| 6 | 15 |
| 7 | 31 |
| 8 | 63 |
| 9 | 127 |
| 10 | 192 |
| 11 | 416 |
| 12 | 848 |
| 13 | 1702 |
| 14 | 3409 |
| 15 | 6819 |
| 16 | 13639 |
| 17 | 27279 |
| 18 | 40920 |
| 19 | 88660 |
| 20 | 180730 |
| 21 | 363167 |
| 22 | 727188 |
| 23 | 1454808 |
| 24 | 2909840 |
| 25 | 5819745 |
| 26 | 11639554 |
| 27 | 23279140 |
| 28 | 46558296 |
| 29 | 93116598 |
| 30 | 186233201 |
| 31 | 372466403 |
| 32 | 744932807 |
| 33 | 1489865615 |
[1,2,3,4,9,15,31,63,127,192,416,848,1702,3409, 6819,13639,27279,40920,88660,180730,363167,727188, 1454808,2909840,5819745,11639554,23279140, 46558296,93116598,186233201,372466403,744932807, 1489865615] |