n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 15 |
5 | 42 |
6 | 107 |
7 | 294 |
8 | 780 |
9 | 2128 |
10 | 5781 |
11 | 15918 |
12 | 43885 |
13 | 122010 |
14 | 340323 |
15 | 954394 |
16 | 2685930 |
17 | 7588770 |
18 | 21507696 |
19 | 61144062 |
20 | 174283887 |
21 | 498012094 |
22 | 1426213191 |
23 | 4092816966 |
24 | 11767176070 |
25 | 33890202192 |
26 | 97761428205 |
27 | 282424564744 |
[1,2,6,15,42,107,294,780,2128,5781,15918,43885, 122010,340323,954394,2685930,7588770,21507696, 61144062,174283887,498012094,1426213191, 4092816966,11767176070,33890202192,97761428205, 282424564744] |