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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 9 |
| 5 | 17 |
| 6 | 39 |
| 7 | 95 |
| 8 | 217 |
| 9 | 473 |
| 10 | 1011 |
| 11 | 2147 |
| 12 | 4545 |
| 13 | 9601 |
| 14 | 20255 |
| 15 | 42703 |
| 16 | 90001 |
| 17 | 189657 |
| 18 | 399627 |
| 19 | 842019 |
| 20 | 1774105 |
| 21 | 3737937 |
| 22 | 7875575 |
| 23 | 16593247 |
| 24 | 34960681 |
| 25 | 73659385 |
| 26 | 155194435 |
| 27 | 326982211 |
| 28 | 688925201 |
| 29 | 1451509889 |
| 30 | 3058214319 |
| 31 | 6443410959 |
[1,2,5,9,17,39,95,217,473,1011,2147,4545,9601, 20255,42703,90001,189657,399627,842019,1774105, 3737937,7875575,16593247,34960681,73659385, 155194435,326982211,688925201,1451509889, 3058214319,6443410959] |