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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 7 |
| 5 | 11 |
| 6 | 24 |
| 7 | 46 |
| 8 | 83 |
| 9 | 162 |
| 10 | 311 |
| 11 | 584 |
| 12 | 1116 |
| 13 | 2132 |
| 14 | 4046 |
| 15 | 7705 |
| 16 | 14685 |
| 17 | 27939 |
| 18 | 53186 |
| 19 | 101287 |
| 20 | 192809 |
| 21 | 367052 |
| 22 | 698852 |
| 23 | 1330465 |
| 24 | 2532908 |
| 25 | 4822273 |
| 26 | 9180720 |
| 27 | 17478296 |
| 28 | 33275580 |
| 29 | 63350648 |
| 30 | 120607809 |
| 31 | 229615269 |
| 32 | 437145509 |
| 33 | 832244516 |
| 34 | 1584440971 |
| 35 | 3016485307 |
[1,1,1,4,7,11,24,46,83,162,311,584,1116,2132,4046, 7705,14685,27939,53186,101287,192809,367052, 698852,1330465,2532908,4822273,9180720,17478296, 33275580,63350648,120607809,229615269,437145509, 832244516,1584440971,3016485307] |