Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 15 |
5 | 64 |
6 | 175 |
7 | 631 |
8 | 1905 |
9 | 6433 |
10 | 20224 |
11 | 66529 |
12 | 212625 |
13 | 692119 |
14 | 2226799 |
15 | 7217728 |
16 | 23284815 |
17 | 75343591 |
18 | 243328225 |
19 | 786800449 |
20 | 2542156800 |
21 | 8217744577 |
22 | 26556314401 |
23 | 85835882791 |
24 | 277405671375 |
25 | 896595420736 |
26 | 2897714688751 |
[0,1,1,7,15,64,175,631,1905,6433,20224,66529, 212625,692119,2226799,7217728,23284815,75343591, 243328225,786800449,2542156800,8217744577, 26556314401,85835882791,277405671375,896595420736, 2897714688751] |