Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 21 |
2 | 51 |
3 | 129 |
4 | 339 |
5 | 921 |
6 | 2571 |
7 | 7329 |
8 | 21219 |
9 | 62121 |
10 | 183291 |
11 | 543729 |
12 | 1618899 |
13 | 4832121 |
14 | 14447211 |
15 | 43243329 |
16 | 129533379 |
17 | 388206921 |
18 | 1163834331 |
19 | 3489930129 |
20 | 10466644659 |
21 | 31393642521 |
22 | 94168344651 |
23 | 282479868129 |
24 | 847389272739 |
25 | 2542067154921 |
[21,51,129,339,921,2571,7329,21219,62121,183291, 543729,1618899,4832121,14447211,43243329, 129533379,388206921,1163834331,3489930129, 10466644659,31393642521,94168344651,282479868129, 847389272739,2542067154921] |