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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 | 4 |
| 5 | 9 |
| 6 | 22 |
| 7 | 57 |
| 8 | 154 |
| 9 | 430 |
| 10 | 1234 |
| 11 | 3625 |
| 12 | 10865 |
| 13 | 33136 |
| 14 | 102598 |
| 15 | 321913 |
| 16 | 1021963 |
| 17 | 3278543 |
| 18 | 10617413 |
| 19 | 34678693 |
| 20 | 114151769 |
| 21 | 378436049 |
| 22 | 1262822229 |
| 23 | 4239469076 |
| 24 | 14312153289 |
| 25 | 48567846377 |
| 26 | 165610404277 |
| 27 | 567259571451 |
| 28 | 1951218773118 |
| 29 | 6738242931451 |
| 30 | 23356148951482 |
[1,1,1,2,4,9,22,57,154,430,1234,3625,10865,33136, 102598,321913,1021963,3278543,10617413,34678693, 114151769,378436049,1262822229,4239469076, 14312153289,48567846377,165610404277,567259571451, 1951218773118,6738242931451,23356148951482] |