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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 | 2 |
| 3 | 152 |
| 4 | 30488 |
| 5 | 18437120 |
| 6 | 13734486480 |
| 7 | 21429982230720 |
| 8 | 40229528835726720 |
| 9 | 131323790370474455040 |
[0,2,152,30488,18437120,13734486480, 21429982230720,40229528835726720, 131323790370474455040] |