n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 24 |
6 | 60 |
7 | 156 |
8 | 410 |
9 | 1092 |
10 | 2952 |
11 | 8052 |
12 | 22140 |
13 | 61320 |
14 | 170820 |
15 | 478288 |
16 | 1345210 |
17 | 3798240 |
18 | 10761660 |
19 | 30585828 |
20 | 87169608 |
21 | 249055976 |
22 | 713205900 |
23 | 2046590844 |
24 | 5883948540 |
25 | 16945772184 |
26 | 48882035160 |
27 | 141214767876 |
[1,2,4,10,24,60,156,410,1092,2952,8052,22140, 61320,170820,478288,1345210,3798240,10761660, 30585828,87169608,249055976,713205900,2046590844, 5883948540,16945772184,48882035160,141214767876] |