Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 10 |
4 | 27 |
5 | 80 |
6 | 230 |
7 | 644 |
8 | 1780 |
9 | 4879 |
10 | 13315 |
11 | 36261 |
12 | 98650 |
13 | 268260 |
14 | 729326 |
15 | 1982655 |
16 | 5389579 |
17 | 14650584 |
18 | 39824632 |
19 | 108254817 |
20 | 294267376 |
21 | 799901968 |
22 | 2174359323 |
23 | 5910521810 |
24 | 16066464445 |
25 | 43673178798 |
26 | 118716008808 |
27 | 322703570021 |
28 | 877199250941 |
[2,4,10,27,80,230,644,1780,4879,13315,36261,98650, 268260,729326,1982655,5389579,14650584,39824632, 108254817,294267376,799901968,2174359323, 5910521810,16066464445,43673178798,118716008808, 322703570021,877199250941] |