Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 5 |
3 | 3 |
4 | 20 |
5 | 70 |
6 | 847 |
7 | 2934 |
8 | 27671 |
9 | 139992 |
10 | 1031816 |
11 | 5985115 |
12 | 41326422 |
13 | 252034826 |
14 | 1675068288 |
15 | 10527431309 |
16 | 68645440055 |
17 | 436700979975 |
18 | 2826143858103 |
19 | 18075619384704 |
20 | 116539777329390 |
21 | 747352195049649 |
22 | 4809997865329487 |
[0,5,3,20,70,847,2934,27671,139992,1031816, 5985115,41326422,252034826,1675068288,10527431309, 68645440055,436700979975,2826143858103, 18075619384704,116539777329390,747352195049649, 4809997865329487] |