Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 4 |
3 | 15 |
4 | 21 |
5 | 45 |
6 | 75 |
7 | 465 |
8 | 1095 |
9 | 2145 |
10 | 4935 |
11 | 14955 |
12 | 80685 |
13 | 229845 |
14 | 1295325 |
15 | 1575285 |
16 | 9700575 |
17 | 20435415 |
18 | 15054105 |
19 | 53999715 |
20 | 2282745465 |
[1,3,4,15,21,45,75,465,1095,2145,4935,14955,80685, 229845,1295325,1575285,9700575,20435415,15054105, 53999715,2282745465] |