n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 15 |
4 | 45 |
5 | 126 |
6 | 378 |
7 | 1107 |
8 | 3321 |
9 | 9882 |
10 | 29646 |
11 | 88695 |
12 | 266085 |
13 | 797526 |
14 | 2392578 |
15 | 7175547 |
16 | 21526641 |
17 | 64573362 |
18 | 193720086 |
19 | 581140575 |
20 | 1743421725 |
21 | 5230206126 |
22 | 15690618378 |
23 | 47071677987 |
24 | 141215033961 |
25 | 423644570442 |
26 | 1270933711326 |
27 | 3812799539655 |
28 | 11438398618965 |
[1,2,6,15,45,126,378,1107,3321,9882,29646,88695, 266085,797526,2392578,7175547,21526641,64573362, 193720086,581140575,1743421725,5230206126, 15690618378,47071677987,141215033961,423644570442, 1270933711326,3812799539655,11438398618965] |