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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 90 |
| 4 | 1122660 |
| 5 | 19099920 |
| 6 | 85864770 |
| 7 | 26089808580 |
| 8 | 554688278430 |
| 9 | 4090932431513070 |
| 10 | 95405042230542330 |
[1,3,90,1122660,19099920,85864770,26089808580, 554688278430,4090932431513070,95405042230542330] |