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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 | 3 |
| 2 | 15 |
| 3 | 120 |
| 4 | 1450 |
| 5 | 25383 |
| 6 | 591563 |
| 7 | 17156364 |
| 8 | 595635903 |
| 9 | 24023004840 |
| 10 | 1102221504614 |
| 11 | 56652798990909 |
| 12 | 3222918574782830 |
| 13 | 200989079661549750 |
| 14 | 13632214370613131094 |
| 15 | 998992560620311541814 |
| 16 | 78653794343072884416393 |
[1,3,15,120,1450,25383,591563,17156364,595635903, 24023004840,1102221504614,56652798990909, 3222918574782830,200989079661549750, 13632214370613131094,998992560620311541814, 78653794343072884416393] |