Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 121 |
4 | 1054 |
5 | 7053 |
6 | 41118 |
7 | 226025 |
8 | 1189600 |
9 | 6090935 |
10 | 30538028 |
11 | 150719259 |
12 | 734621288 |
13 | 3544728240 |
14 | 16962264274 |
15 | 80602719361 |
16 | 380741691862 |
17 | 1789303173765 |
18 | 8371399843188 |
19 | 39012925707604 |
20 | 181180019619130 |
21 | 838816233474674 |
[0,2,121,1054,7053,41118,226025,1189600,6090935, 30538028,150719259,734621288,3544728240, 16962264274,80602719361,380741691862, 1789303173765,8371399843188,39012925707604, 181180019619130,838816233474674] |