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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 7 |
| 4 | 7 |
| 5 | 14 |
| 6 | 15 |
| 7 | 27 |
| 8 | 40 |
| 9 | 69 |
| 10 | 109 |
| 11 | 206 |
| 12 | 353 |
| 13 | 649 |
| 14 | 1192 |
| 15 | 2219 |
| 16 | 4117 |
| 17 | 7762 |
| 18 | 14603 |
| 19 | 27669 |
| 20 | 52506 |
| 21 | 99991 |
| 22 | 190747 |
| 23 | 364950 |
| 24 | 699259 |
| 25 | 1342539 |
| 26 | 2581468 |
| 27 | 4971721 |
| 28 | 9587581 |
| 29 | 18514054 |
| 30 | 35792569 |
| 31 | 69275887 |
| 32 | 134219908 |
| 33 | 260305295 |
| 34 | 505294149 |
[1,3,4,7,7,14,15,27,40,69,109,206,353,649,1192, 2219,4117,7762,14603,27669,52506,99991,190747, 364950,699259,1342539,2581468,4971721,9587581, 18514054,35792569,69275887,134219908,260305295, 505294149] |