n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 51 |
5 | 187 |
6 | 716 |
7 | 2811 |
8 | 11204 |
9 | 45089 |
10 | 182636 |
11 | 743180 |
12 | 3034361 |
13 | 12420945 |
14 | 50946169 |
15 | 209296302 |
16 | 860941813 |
17 | 3545265139 |
18 | 14611979639 |
19 | 60268977054 |
20 | 248744871983 |
21 | 1027188978686 |
22 | 4243751316106 |
23 | 17539851091965 |
24 | 72519657462805 |
25 | 299930389183429 |
26 | 1240806275485094 |
[1,2,5,15,51,187,716,2811,11204,45089,182636, 743180,3034361,12420945,50946169,209296302, 860941813,3545265139,14611979639,60268977054, 248744871983,1027188978686,4243751316106, 17539851091965,72519657462805,299930389183429, 1240806275485094] |