Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 6 |
5 | 19 |
6 | 73 |
7 | 264 |
8 | 973 |
9 | 3565 |
10 | 13086 |
11 | 48007 |
12 | 176149 |
13 | 646296 |
14 | 2371321 |
15 | 8700553 |
16 | 31923030 |
17 | 117128107 |
18 | 429752305 |
19 | 1576795176 |
20 | 5785386229 |
21 | 21227039605 |
22 | 77883687150 |
23 | 285761407807 |
24 | 1048481205661 |
25 | 3846960466104 |
26 | 14114802199681 |
27 | 51788325586033 |
[0,1,1,6,19,73,264,973,3565,13086,48007,176149, 646296,2371321,8700553,31923030,117128107, 429752305,1576795176,5785386229,21227039605, 77883687150,285761407807,1048481205661, 3846960466104,14114802199681,51788325586033] |