Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 26 |
4 | 142 |
5 | 876 |
6 | 5790 |
7 | 40020 |
8 | 285582 |
9 | 2087612 |
10 | 15551620 |
11 | 117629724 |
12 | 900964558 |
13 | 6973745924 |
14 | 54464010540 |
15 | 428645647572 |
16 | 3396238954446 |
17 | 27067890450300 |
18 | 216857021933172 |
19 | 1745460025192140 |
20 | 14107695302434356 |
21 | 114455036696796168 |
22 | 931738743735004596 |
[1,2,6,26,142,876,5790,40020,285582,2087612, 15551620,117629724,900964558,6973745924, 54464010540,428645647572,3396238954446, 27067890450300,216857021933172,1745460025192140, 14107695302434356,114455036696796168, 931738743735004596] |