n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 5 |
8 | 15 |
9 | 45 |
10 | 69 |
11 | 191 |
12 | 523 |
13 | 2197 |
14 | 7857 |
15 | 44519 |
16 | 172481 |
17 | 1142709 |
18 | 5725361 |
19 | 46827941 |
20 | 294096301 |
21 | 2934334465 |
22 | 22633368087 |
[1,1,1,1,1,1,5,15,45,69,191,523,2197,7857,44519, 172481,1142709,5725361,46827941,294096301, 2934334465,22633368087] |