n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 20 |
6 | 66 |
7 | 238 |
8 | 902 |
9 | 3510 |
10 | 13846 |
11 | 54998 |
12 | 219222 |
13 | 875350 |
14 | 3498326 |
15 | 13987158 |
16 | 55936342 |
17 | 223720790 |
18 | 894834006 |
19 | 3579237718 |
20 | 14316754262 |
21 | 57266623830 |
22 | 229065708886 |
23 | 916261262678 |
24 | 3665041904982 |
25 | 14660161328470 |
26 | 58640632730966 |
[1,2,3,7,20,66,238,902,3510,13846,54998,219222, 875350,3498326,13987158,55936342,223720790, 894834006,3579237718,14316754262,57266623830, 229065708886,916261262678,3665041904982, 14660161328470,58640632730966] |