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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 | 9 |
| 5 | 33 |
| 6 | 125 |
| 7 | 501 |
| 8 | 2063 |
| 9 | 8719 |
| 10 | 37531 |
| 11 | 164093 |
| 12 | 726491 |
| 13 | 3250743 |
| 14 | 14676923 |
| 15 | 66780835 |
| 16 | 305908709 |
| 17 | 1409609741 |
| 18 | 6529455069 |
| 19 | 30386379215 |
| 20 | 142002499261 |
| 21 | 666116180157 |
| 22 | 3135363209281 |
| 23 | 14803932109737 |
| 24 | 70097438174979 |
[1,1,3,9,33,125,501,2063,8719,37531,164093,726491, 3250743,14676923,66780835,305908709,1409609741, 6529455069,30386379215,142002499261,666116180157, 3135363209281,14803932109737,70097438174979] |