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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 13 |
| 7 | 34 |
| 8 | 91 |
| 9 | 257 |
| 10 | 753 |
| 11 | 2289 |
| 12 | 7185 |
| 13 | 23215 |
| 14 | 77018 |
| 15 | 261740 |
| 16 | 909353 |
| 17 | 3224262 |
| 18 | 11649471 |
| 19 | 42833406 |
| 20 | 160084445 |
| 21 | 607507991 |
| 22 | 2338760044 |
| 23 | 9126115359 |
| 24 | 36068187761 |
| 25 | 144279012291 |
| 26 | 583783534410 |
| 27 | 2387939881856 |
| 28 | 9869420688875 |
| 29 | 41195421572446 |
| 30 | 173581696703761 |
[0,0,1,2,5,13,34,91,257,753,2289,7185,23215,77018, 261740,909353,3224262,11649471,42833406,160084445, 607507991,2338760044,9126115359,36068187761, 144279012291,583783534410,2387939881856, 9869420688875,41195421572446,173581696703761] |