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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 4 |
| 7 | 10 |
| 8 | 19 |
| 9 | 40 |
| 10 | 123 |
| 11 | 434 |
| 12 | 1945 |
| 13 | 8733 |
| 14 | 42692 |
| 15 | 242511 |
| 16 | 1635703 |
| 17 | 12770421 |
| 18 | 112939524 |
| 19 | 1121434189 |
| 20 | 12675288592 |
| 21 | 164781726936 |
[1,4,10,19,40,123,434,1945,8733,42692,242511, 1635703,12770421,112939524,1121434189,12675288592, 164781726936] |