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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 29 |
| 4 | 122 |
| 5 | 513 |
| 6 | 2243 |
| 7 | 9961 |
| 8 | 44856 |
| 9 | 204818 |
| 10 | 941322 |
| 11 | 4369665 |
| 12 | 20369726 |
| 13 | 95602287 |
| 14 | 450244292 |
| 15 | 2130136795 |
| 16 | 10108543290 |
| 17 | 48122370353 |
| 18 | 229702139387 |
| 19 | 1099001217726 |
| 20 | 5270159434511 |
| 21 | 25318939228657 |
| 22 | 121870589729052 |
| 23 | 587505709487940 |
| 24 | 2836707110770954 |
| 25 | 13714670877340031 |
| 26 | 66393874417766927 |
[1,2,8,29,122,513,2243,9961,44856,204818,941322, 4369665,20369726,95602287,450244292,2130136795, 10108543290,48122370353,229702139387, 1099001217726,5270159434511,25318939228657, 121870589729052,587505709487940,2836707110770954, 13714670877340031,66393874417766927] |