Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 4 |
6 | 18 |
7 | 105 |
8 | 741 |
9 | 6006 |
10 | 54718 |
11 | 553254 |
12 | 6147264 |
13 | 74450194 |
14 | 976124761 |
15 | 13774204959 |
16 | 208143541602 |
17 | 3353423725802 |
18 | 57380805974820 |
19 | 1039230152655058 |
20 | 19860842917407766 |
21 | 399423618672311730 |
[1,1,1,1,1,4,18,105,741,6006,54718,553254,6147264, 74450194,976124761,13774204959,208143541602, 3353423725802,57380805974820,1039230152655058, 19860842917407766,399423618672311730] |