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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 7 |
| 8 | 11 |
| 9 | 22 |
| 10 | 49 |
| 11 | 104 |
| 12 | 212 |
| 13 | 471 |
| 14 | 1112 |
| 15 | 2584 |
| 16 | 6000 |
| 17 | 14574 |
| 18 | 36488 |
| 19 | 91148 |
| 20 | 230011 |
| 21 | 596893 |
| 22 | 1574433 |
| 23 | 4171388 |
| 24 | 11193376 |
| 25 | 30594229 |
| 26 | 84527225 |
| 27 | 235243027 |
| 28 | 662702701 |
| 29 | 1891111335 |
| 30 | 5443353369 |
| 31 | 15797764276 |
| 32 | 46336647188 |
| 33 | 137245713050 |
| 34 | 409670144432 |
[1,1,1,1,1,2,4,7,11,22,49,104,212,471,1112,2584, 6000,14574,36488,91148,230011,596893,1574433, 4171388,11193376,30594229,84527225,235243027, 662702701,1891111335,5443353369,15797764276, 46336647188,137245713050,409670144432] |