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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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 33 |
| 7 | 108 |
| 8 | 357 |
| 9 | 1405 |
| 10 | 5713 |
| 11 | 24670 |
| 12 | 117413 |
| 13 | 574007 |
| 14 | 3004577 |
| 15 | 16608120 |
| 16 | 95057925 |
| 17 | 576245913 |
| 18 | 3622049809 |
| 19 | 23693870554 |
| 20 | 161816447365 |
| 21 | 1140392550275 |
| 22 | 8351286979745 |
| 23 | 63206781102116 |
| 24 | 493344133444389 |
| 25 | 3980464191557205 |
| 26 | 33029872125113937 |
| 27 | 282290255465835382 |
[1,1,1,2,5,11,33,108,357,1405,5713,24670,117413, 574007,3004577,16608120,95057925,576245913, 3622049809,23693870554,161816447365,1140392550275, 8351286979745,63206781102116,493344133444389, 3980464191557205,33029872125113937, 282290255465835382] |