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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 33 |
| 4 | 149 |
| 5 | 689 |
| 6 | 3259 |
| 7 | 15596 |
| 8 | 75353 |
| 9 | 366486 |
| 10 | 1791533 |
| 11 | 8791782 |
| 12 | 43276756 |
| 13 | 213542743 |
| 14 | 1055751847 |
| 15 | 5227922739 |
| 16 | 25921772174 |
| 17 | 128668445966 |
| 18 | 639255561410 |
| 19 | 3178413212779 |
| 20 | 15813550746417 |
| 21 | 78720978575891 |
| 22 | 392066434170623 |
| 23 | 1953478763295965 |
| 24 | 9736748070491251 |
| 25 | 48546225260336401 |
| 26 | 242112066053535433 |
[1,2,8,33,149,689,3259,15596,75353,366486,1791533, 8791782,43276756,213542743,1055751847,5227922739, 25921772174,128668445966,639255561410, 3178413212779,15813550746417,78720978575891, 392066434170623,1953478763295965,9736748070491251, 48546225260336401,242112066053535433] |