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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 8 |
| 6 | 19 |
| 7 | 34 |
| 8 | 80 |
| 9 | 165 |
| 10 | 394 |
| 11 | 892 |
| 12 | 2192 |
| 13 | 5232 |
| 14 | 13057 |
| 15 | 32271 |
| 16 | 81568 |
| 17 | 205748 |
| 18 | 525735 |
| 19 | 1344828 |
| 20 | 3467415 |
| 21 | 8960849 |
| 22 | 23280323 |
| 23 | 60639680 |
| 24 | 158559047 |
| 25 | 415631368 |
| 26 | 1092734050 |
| 27 | 2879420753 |
| 28 | 7605713020 |
| 29 | 20130266302 |
| 30 | 53386744298 |
| 31 | 141836904569 |
| 32 | 377479973474 |
| 33 | 1006189769886 |
[0,1,2,5,8,19,34,80,165,394,892,2192,5232,13057, 32271,81568,205748,525735,1344828,3467415,8960849, 23280323,60639680,158559047,415631368,1092734050, 2879420753,7605713020,20130266302,53386744298, 141836904569,377479973474,1006189769886] |