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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 30 |
| 7 | 60 |
| 8 | 123 |
| 9 | 254 |
| 10 | 517 |
| 11 | 1040 |
| 12 | 2093 |
| 13 | 4226 |
| 14 | 8523 |
| 15 | 17146 |
| 16 | 34469 |
| 17 | 69295 |
| 18 | 139263 |
| 19 | 279803 |
| 20 | 562076 |
| 21 | 1128834 |
| 22 | 2266768 |
| 23 | 4551848 |
| 24 | 9139963 |
| 25 | 18350850 |
| 26 | 36842933 |
| 27 | 73969425 |
| 28 | 148503840 |
| 29 | 298134233 |
| 30 | 598527760 |
| 31 | 1201583460 |
| 32 | 2412228147 |
| 33 | 4842626698 |
| 34 | 9721723262 |
| 35 | 19516574603 |
[1,1,1,3,7,15,30,60,123,254,517,1040,2093,4226, 8523,17146,34469,69295,139263,279803,562076, 1128834,2266768,4551848,9139963,18350850,36842933, 73969425,148503840,298134233,598527760,1201583460, 2412228147,4842626698,9721723262,19516574603] |