n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 110 |
6 | 484 |
7 | 2514 |
8 | 15142 |
9 | 104126 |
10 | 806772 |
11 | 6965090 |
12 | 66374766 |
13 | 692629618 |
14 | 7860173564 |
15 | 96428710490 |
16 | 1272217776422 |
17 | 17968286438066 |
18 | 270569090589308 |
19 | 4328163151246858 |
20 | 73311692500174358 |
21 | 1311041890981700358 |
[1,2,4,10,30,110,484,2514,15142,104126,806772, 6965090,66374766,692629618,7860173564,96428710490, 1272217776422,17968286438066,270569090589308, 4328163151246858,73311692500174358, 1311041890981700358] |