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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 3 |
| 6 | 7 |
| 7 | 14 |
| 8 | 11 |
| 9 | 25 |
| 10 | 51 |
| 11 | 97 |
| 12 | 92 |
| 13 | 189 |
| 14 | 365 |
| 15 | 674 |
| 16 | 709 |
| 17 | 1383 |
| 18 | 2587 |
| 19 | 4685 |
| 20 | 5270 |
| 21 | 9955 |
| 22 | 18228 |
| 23 | 32551 |
| 24 | 38403 |
| 25 | 70954 |
| 26 | 127921 |
| 27 | 226007 |
| 28 | 276408 |
| 29 | 502415 |
| 30 | 895103 |
| 31 | 1568062 |
| 32 | 1972851 |
| 33 | 3540913 |
| 34 | 6249235 |
| 35 | 10871723 |
| 36 | 13996408 |
| 37 | 24868131 |
| 38 | 43551364 |
| 39 | 75326395 |
| 40 | 98847749 |
[0,0,1,2,1,3,7,14,11,25,51,97,92,189,365,674,709, 1383,2587,4685,5270,9955,18228,32551,38403,70954, 127921,226007,276408,502415,895103,1568062, 1972851,3540913,6249235,10871723,13996408, 24868131,43551364,75326395,98847749] |