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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 20 |
| 7 | 41 |
| 8 | 75 |
| 9 | 147 |
| 10 | 272 |
| 11 | 533 |
| 12 | 976 |
| 13 | 1881 |
| 14 | 3490 |
| 15 | 6616 |
| 16 | 12378 |
| 17 | 23405 |
| 18 | 43781 |
| 19 | 82536 |
| 20 | 154709 |
| 21 | 291043 |
| 22 | 546139 |
| 23 | 1026685 |
| 24 | 1927038 |
| 25 | 3621004 |
| 26 | 6798417 |
| 27 | 12770935 |
| 28 | 23980791 |
| 29 | 45042957 |
| 30 | 84584416 |
| 31 | 158863805 |
| 32 | 298336153 |
| 33 | 560302805 |
| 34 | 1052234995 |
| 35 | 1976157456 |
| 36 | 3711209272 |
[1,0,2,5,11,20,41,75,147,272,533,976,1881,3490, 6616,12378,23405,43781,82536,154709,291043,546139, 1026685,1927038,3621004,6798417,12770935,23980791, 45042957,84584416,158863805,298336153,560302805, 1052234995,1976157456,3711209272] |