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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 35 |
| 4 | 134 |
| 5 | 541 |
| 6 | 2245 |
| 7 | 9423 |
| 8 | 40264 |
| 9 | 174677 |
| 10 | 765999 |
| 11 | 3378993 |
| 12 | 15015062 |
| 13 | 67172893 |
| 14 | 302152668 |
| 15 | 1363987239 |
| 16 | 6181971004 |
| 17 | 28123733683 |
| 18 | 128357658619 |
| 19 | 587218526389 |
| 20 | 2693201631582 |
| 21 | 12381487370775 |
| 22 | 57042683267028 |
| 23 | 263242929396829 |
| 24 | 1216926606638440 |
| 25 | 5634919151844065 |
| 26 | 26131475075744005 |
[1,3,10,35,134,541,2245,9423,40264,174677,765999, 3378993,15015062,67172893,302152668,1363987239, 6181971004,28123733683,128357658619,587218526389, 2693201631582,12381487370775,57042683267028, 263242929396829,1216926606638440,5634919151844065, 26131475075744005] |