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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 9 |
| 8 | 32 |
| 9 | 92 |
| 10 | 243 |
| 11 | 587 |
| 12 | 1361 |
| 13 | 3027 |
| 14 | 6564 |
| 15 | 13928 |
| 16 | 29127 |
| 17 | 60180 |
| 18 | 123300 |
| 19 | 250945 |
| 20 | 508326 |
| 21 | 1025977 |
| 22 | 2065437 |
| 23 | 4150056 |
| 24 | 8327344 |
| 25 | 16692844 |
| 26 | 33438984 |
| 27 | 66951671 |
| 28 | 134004892 |
| 29 | 268148573 |
| 30 | 536486146 |
| 31 | 1073227893 |
| 32 | 2146800237 |
| 33 | 4294061970 |
| 34 | 8588740071 |
| 35 | 17178298617 |
[0,0,0,0,0,0,2,9,32,92,243,587,1361,3027,6564, 13928,29127,60180,123300,250945,508326,1025977, 2065437,4150056,8327344,16692844,33438984, 66951671,134004892,268148573,536486146,1073227893, 2146800237,4294061970,8588740071,17178298617] |