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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 29 |
| 4 | 122 |
| 5 | 516 |
| 6 | 2253 |
| 7 | 10019 |
| 8 | 45223 |
| 9 | 205633 |
| 10 | 948552 |
| 11 | 4383695 |
| 12 | 20467864 |
| 13 | 95853451 |
| 14 | 451175590 |
| 15 | 2133028680 |
| 16 | 10110239852 |
| 17 | 48104263016 |
| 18 | 229403087222 |
| 19 | 1096730547084 |
| 20 | 5255720495831 |
| 21 | 25229713743029 |
| 22 | 121361215731913 |
| 23 | 584670220548122 |
| 24 | 2821064568974016 |
| 25 | 13631559528851392 |
| 26 | 65948796453391527 |
[1,2,8,29,122,516,2253,10019,45223,205633,948552, 4383695,20467864,95853451,451175590,2133028680, 10110239852,48104263016,229403087222, 1096730547084,5255720495831,25229713743029, 121361215731913,584670220548122,2821064568974016, 13631559528851392,65948796453391527] |