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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 19 |
| 5 | 89 |
| 6 | 410 |
| 7 | 2052 |
| 8 | 10440 |
| 9 | 54874 |
| 10 | 293549 |
| 11 | 1597621 |
| 12 | 8807766 |
| 13 | 49107289 |
| 14 | 276358791 |
| 15 | 1567866228 |
| 16 | 8957204966 |
| 17 | 51486464912 |
| 18 | 297548288251 |
| 19 | 1727856600935 |
| 20 | 10076859047404 |
| 21 | 58996263573440 |
| 22 | 346614270372761 |
| 23 | 2042929868812385 |
| 24 | 12076076910981403 |
[0,1,1,5,19,89,410,2052,10440,54874,293549, 1597621,8807766,49107289,276358791,1567866228, 8957204966,51486464912,297548288251,1727856600935, 10076859047404,58996263573440,346614270372761, 2042929868812385,12076076910981403] |