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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 6 |
| 8 | 11 |
| 9 | 23 |
| 10 | 46 |
| 11 | 97 |
| 12 | 205 |
| 13 | 448 |
| 14 | 1004 |
| 15 | 2339 |
| 16 | 5661 |
| 17 | 14291 |
| 18 | 37507 |
| 19 | 101962 |
| 20 | 285386 |
| 21 | 817772 |
| 22 | 2386946 |
| 23 | 7069893 |
| 24 | 21195092 |
| 25 | 64225525 |
| 26 | 196636559 |
| 27 | 608551084 |
| 28 | 1905848637 |
| 29 | 6049696252 |
| 30 | 19501015441 |
| 31 | 63960251538 |
| 32 | 213822965681 |
| 33 | 729536174204 |
| 34 | 2541833303563 |
[1,0,1,1,1,2,3,6,11,23,46,97,205,448,1004,2339, 5661,14291,37507,101962,285386,817772,2386946, 7069893,21195092,64225525,196636559,608551084, 1905848637,6049696252,19501015441,63960251538, 213822965681,729536174204,2541833303563] |