n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 60 |
5 | 204 |
6 | 716 |
7 | 2560 |
8 | 9296 |
9 | 34128 |
10 | 126560 |
11 | 472864 |
12 | 1778016 |
13 | 6722880 |
14 | 25536768 |
15 | 97384128 |
16 | 372691968 |
17 | 1430618112 |
18 | 5506231808 |
19 | 21244025088 |
20 | 82137286400 |
21 | 318177976064 |
22 | 1234689470976 |
23 | 4798686523904 |
24 | 18676787597824 |
25 | 72786442978304 |
26 | 283997288733696 |
27 | 1109305183011840 |
28 | 4337384738945024 |
[1,2,6,18,60,204,716,2560,9296,34128,126560, 472864,1778016,6722880,25536768,97384128, 372691968,1430618112,5506231808,21244025088, 82137286400,318177976064,1234689470976, 4798686523904,18676787597824,72786442978304, 283997288733696,1109305183011840,4337384738945024] |