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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 13 |
| 5 | 47 |
| 6 | 173 |
| 7 | 639 |
| 8 | 2357 |
| 9 | 8695 |
| 10 | 32077 |
| 11 | 118335 |
| 12 | 436549 |
| 13 | 1610471 |
| 14 | 5941181 |
| 15 | 21917583 |
| 16 | 80856053 |
| 17 | 298285687 |
| 18 | 1100404333 |
| 19 | 4059496479 |
| 20 | 14975869477 |
| 21 | 55247410055 |
| 22 | 203812962077 |
| 23 | 751885445295 |
| 24 | 2773777080149 |
| 25 | 10232728055191 |
[1,1,3,13,47,173,639,2357,8695,32077,118335, 436549,1610471,5941181,21917583,80856053, 298285687,1100404333,4059496479,14975869477, 55247410055,203812962077,751885445295, 2773777080149,10232728055191] |