n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 131 |
7 | 417 |
8 | 1341 |
9 | 4334 |
10 | 14042 |
11 | 45562 |
12 | 148029 |
13 | 481804 |
14 | 1572625 |
15 | 5156025 |
16 | 17018505 |
17 | 56717910 |
18 | 191540940 |
19 | 658084182 |
20 | 2309516616 |
[1,2,5,14,42,131,417,1341,4334,14042,45562,148029, 481804,1572625,5156025,17018505,56717910, 191540940,658084182,2309516616] |