Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 18 |
4 | 209 |
5 | 4988 |
6 | 221443 |
7 | 19332957 |
8 | 3266183233 |
9 | 1068404830615 |
10 | 677798120112881 |
11 | 833288676199771911 |
[1,4,18,209,4988,221443,19332957,3266183233, 1068404830615,677798120112881,833288676199771911] |