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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 6 |
| 8 | 12 |
| 9 | 23 |
| 10 | 45 |
| 11 | 86 |
| 12 | 165 |
| 13 | 317 |
| 14 | 612 |
| 15 | 1183 |
| 16 | 2292 |
| 17 | 4451 |
| 18 | 8654 |
| 19 | 16853 |
| 20 | 32865 |
| 21 | 64165 |
| 22 | 125414 |
| 23 | 245375 |
| 24 | 480526 |
| 25 | 941832 |
| 26 | 1847440 |
| 27 | 3626457 |
| 28 | 7123398 |
| 29 | 14001162 |
| 30 | 27535618 |
| 31 | 54182991 |
| 32 | 106672764 |
| 33 | 210113021 |
| 34 | 414046247 |
| 35 | 816262602 |
[0,0,0,0,1,1,3,6,12,23,45,86,165,317,612,1183, 2292,4451,8654,16853,32865,64165,125414,245375, 480526,941832,1847440,3626457,7123398,14001162, 27535618,54182991,106672764,210113021,414046247, 816262602] |