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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 11 |
| 7 | 28 |
| 8 | 71 |
| 9 | 165 |
| 10 | 372 |
| 11 | 807 |
| 12 | 1725 |
| 13 | 3611 |
| 14 | 7481 |
| 15 | 15345 |
| 16 | 31274 |
| 17 | 63392 |
| 18 | 128040 |
| 19 | 257865 |
| 20 | 518318 |
| 21 | 1040277 |
| 22 | 2085714 |
| 23 | 4178596 |
| 24 | 8367205 |
| 25 | 16748151 |
| 26 | 33515214 |
| 27 | 67056139 |
| 28 | 134147231 |
| 29 | 268341515 |
| 30 | 536746350 |
| 31 | 1073577185 |
| 32 | 2147266984 |
| 33 | 4294683056 |
| 34 | 8589563136 |
| 35 | 17179385180 |
[0,0,0,0,1,3,11,28,71,165,372,807,1725,3611,7481, 15345,31274,63392,128040,257865,518318,1040277, 2085714,4178596,8367205,16748151,33515214, 67056139,134147231,268341515,536746350,1073577185, 2147266984,4294683056,8589563136,17179385180] |