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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 15 |
| 6 | 41 |
| 7 | 77 |
| 8 | 161 |
| 9 | 325 |
| 10 | 727 |
| 11 | 1460 |
| 12 | 3058 |
| 13 | 6228 |
| 14 | 12815 |
| 15 | 26447 |
| 16 | 54099 |
| 17 | 110800 |
| 18 | 226247 |
| 19 | 461531 |
| 20 | 939678 |
| 21 | 1914189 |
| 22 | 3890279 |
| 23 | 7905962 |
| 24 | 16045367 |
| 25 | 32550830 |
| 26 | 65971827 |
| 27 | 133645098 |
| 28 | 270561031 |
| 29 | 547468214 |
| 30 | 1107208235 |
| 31 | 2238242852 |
| 32 | 4522679064 |
| 33 | 9135128917 |
[0,1,1,5,7,15,41,77,161,325,727,1460,3058,6228, 12815,26447,54099,110800,226247,461531,939678, 1914189,3890279,7905962,16045367,32550830, 65971827,133645098,270561031,547468214,1107208235, 2238242852,4522679064,9135128917] |