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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 20 |
| 7 | 115 |
| 8 | 723 |
| 9 | 4835 |
| 10 | 33832 |
| 11 | 245089 |
| 12 | 1824893 |
| 13 | 13893810 |
| 14 | 107749252 |
| 15 | 848696376 |
| 16 | 6774097185 |
| 17 | 54692748147 |
| 18 | 446021523425 |
| 19 | 3669543413721 |
| 20 | 30427671594741 |
| 21 | 254076922595096 |
| 22 | 2134989658404402 |
| 23 | 18042590178781082 |
| 24 | 153267162148483634 |
| 25 | 1308129496836500296 |
[1,1,4,20,115,723,4835,33832,245089,1824893, 13893810,107749252,848696376,6774097185, 54692748147,446021523425,3669543413721, 30427671594741,254076922595096,2134989658404402, 18042590178781082,153267162148483634, 1308129496836500296] |