n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 22 |
6 | 65 |
7 | 213 |
8 | 693 |
9 | 2352 |
10 | 8034 |
11 | 28014 |
12 | 98505 |
13 | 350548 |
14 | 1256827 |
15 | 4542395 |
16 | 16517631 |
17 | 60417708 |
18 | 222087320 |
19 | 820099720 |
20 | 3040555978 |
21 | 11314532376 |
22 | 42243332130 |
23 | 158196980682 |
24 | 594075563613 |
25 | 2236627194858 |
26 | 8440468925400 |
[1,1,3,7,22,65,213,693,2352,8034,28014,98505, 350548,1256827,4542395,16517631,60417708, 222087320,820099720,3040555978,11314532376, 42243332130,158196980682,594075563613, 2236627194858,8440468925400] |