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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 15 |
| 4 | 48 |
| 5 | 163 |
| 6 | 573 |
| 7 | 2093 |
| 8 | 7827 |
| 9 | 29830 |
| 10 | 115754 |
| 11 | 455939 |
| 12 | 1817086 |
| 13 | 7316796 |
| 14 | 29756708 |
| 15 | 122012669 |
| 16 | 503813023 |
| 17 | 2094285936 |
| 18 | 8759168442 |
| 19 | 36826653285 |
| 20 | 155577457016 |
| 21 | 660287621380 |
| 22 | 2813953261588 |
| 23 | 12036662291890 |
| 24 | 51668602454264 |
| 25 | 222532058296393 |
| 26 | 961307279118620 |
| 27 | 4164329282317083 |
[1,2,5,15,48,163,573,2093,7827,29830,115754, 455939,1817086,7316796,29756708,122012669, 503813023,2094285936,8759168442,36826653285, 155577457016,660287621380,2813953261588, 12036662291890,51668602454264,222532058296393, 961307279118620,4164329282317083] |