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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 14 |
| 4 | 26 |
| 5 | 58 |
| 6 | 110 |
| 7 | 234 |
| 8 | 422 |
| 9 | 958 |
| 10 | 1762 |
| 11 | 3764 |
| 12 | 6770 |
| 13 | 15324 |
| 14 | 28246 |
| 15 | 60310 |
| 16 | 108262 |
| 17 | 245694 |
| 18 | 450786 |
| 19 | 964542 |
| 20 | 1733794 |
| 21 | 3922870 |
| 22 | 7232182 |
| 23 | 15450110 |
| 24 | 27713538 |
| 25 | 62894790 |
| 26 | 115408110 |
| 27 | 246908842 |
| 28 | 443874432 |
| 29 | 1004242796 |
| 30 | 1851444590 |
| 31 | 3954966506 |
| 32 | 7095320624 |
[1,3,6,14,26,58,110,234,422,958,1762,3764,6770, 15324,28246,60310,108262,245694,450786,964542, 1733794,3922870,7232182,15450110,27713538, 62894790,115408110,246908842,443874432,1004242796, 1851444590,3954966506,7095320624] |