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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 17 |
| 6 | 46 |
| 7 | 120 |
| 8 | 355 |
| 9 | 1032 |
| 10 | 3100 |
| 11 | 9340 |
| 12 | 29696 |
| 13 | 95081 |
| 14 | 313347 |
| 15 | 1029034 |
| 16 | 3432205 |
| 17 | 11592025 |
| 18 | 39779168 |
| 19 | 137877429 |
| 20 | 481249138 |
| 21 | 1686693258 |
| 22 | 5964861195 |
| 23 | 21272314918 |
| 24 | 76492455917 |
| 25 | 276544510969 |
| 26 | 1003517401394 |
| 27 | 3658674178950 |
| 28 | 13417837913677 |
| 29 | 49490455637968 |
| 30 | 183410344857840 |
| 31 | 681873034580703 |
| 32 | 2542965407836124 |
[1,1,2,3,8,17,46,120,355,1032,3100,9340,29696, 95081,313347,1029034,3432205,11592025,39779168, 137877429,481249138,1686693258,5964861195, 21272314918,76492455917,276544510969, 1003517401394,3658674178950,13417837913677, 49490455637968,183410344857840,681873034580703, 2542965407836124] |