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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 24 |
| 9 | 47 |
| 10 | 103 |
| 11 | 214 |
| 12 | 481 |
| 13 | 1030 |
| 14 | 2337 |
| 15 | 5131 |
| 16 | 11813 |
| 17 | 26329 |
| 18 | 60958 |
| 19 | 137821 |
| 20 | 321690 |
| 21 | 734428 |
| 22 | 1721998 |
| 23 | 3966556 |
| 24 | 9352353 |
| 25 | 21683445 |
| 26 | 51296030 |
| 27 | 119663812 |
| 28 | 284198136 |
| 29 | 666132304 |
| 30 | 1586230523 |
| 31 | 3734594241 |
| 32 | 8919845275 |
| 33 | 21075282588 |
| 34 | 50441436842 |
[1,1,1,2,3,6,11,24,47,103,214,481,1030,2337,5131, 11813,26329,60958,137821,321690,734428,1721998, 3966556,9352353,21683445,51296030,119663812, 284198136,666132304,1586230523,3734594241, 8919845275,21075282588,50441436842] |