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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 21 |
| 7 | 43 |
| 8 | 81 |
| 9 | 161 |
| 10 | 325 |
| 11 | 637 |
| 12 | 1260 |
| 13 | 2520 |
| 14 | 4999 |
| 15 | 9917 |
| 16 | 19770 |
| 17 | 39354 |
| 18 | 78275 |
| 19 | 155969 |
| 20 | 310818 |
| 21 | 619174 |
| 22 | 1234199 |
| 23 | 2460905 |
| 24 | 4906597 |
| 25 | 9785125 |
| 26 | 19518887 |
| 27 | 38937907 |
| 28 | 77686076 |
| 29 | 155017552 |
| 30 | 309355889 |
| 31 | 617411371 |
| 32 | 1232356841 |
| 33 | 2459998905 |
| 34 | 4910949493 |
| 35 | 9804596413 |
[1,1,3,6,10,21,43,81,161,325,637,1260,2520,4999, 9917,19770,39354,78275,155969,310818,619174, 1234199,2460905,4906597,9785125,19518887,38937907, 77686076,155017552,309355889,617411371,1232356841, 2459998905,4910949493,9804596413] |