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 | 20 |
4 | 74 |
5 | 292 |
6 | 1214 |
7 | 5252 |
8 | 23468 |
9 | 107672 |
10 | 505048 |
11 | 2413776 |
12 | 11723188 |
13 | 57737032 |
14 | 287853518 |
15 | 1450697572 |
16 | 7381645844 |
17 | 37884748712 |
18 | 195947389208 |
19 | 1020610698832 |
20 | 5349968198328 |
21 | 28208066576176 |
22 | 149526042974008 |
23 | 796520870628752 |
24 | 4262367319460848 |
[1,2,6,20,74,292,1214,5252,23468,107672,505048, 2413776,11723188,57737032,287853518,1450697572, 7381645844,37884748712,195947389208,1020610698832, 5349968198328,28208066576176,149526042974008, 796520870628752,4262367319460848] |