n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 64 |
5 | 220 |
6 | 792 |
7 | 2844 |
8 | 10508 |
9 | 38726 |
10 | 144976 |
11 | 542780 |
12 | 2051752 |
13 | 7761764 |
14 | 29554000 |
15 | 112658878 |
16 | 431389136 |
17 | 1653790724 |
18 | 6360803312 |
19 | 24493717106 |
20 | 94551791464 |
21 | 365396555846 |
22 | 1414800367992 |
23 | 5483604012036 |
24 | 21286461979104 |
25 | 82707275267172 |
26 | 321758489858736 |
27 | 1252797572552836 |
28 | 4883010365872848 |
[1,2,6,18,64,220,792,2844,10508,38726,144976, 542780,2051752,7761764,29554000,112658878, 431389136,1653790724,6360803312,24493717106, 94551791464,365396555846,1414800367992, 5483604012036,21286461979104,82707275267172, 321758489858736,1252797572552836,4883010365872848] |