n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 24 |
4 | 90 |
5 | 541 |
6 | 2032 |
7 | 12275 |
8 | 46472 |
9 | 282003 |
10 | 1075404 |
11 | 6549906 |
12 | 25125114 |
13 | 153481299 |
14 | 591529776 |
15 | 3622111560 |
16 | 14013307170 |
17 | 85975792075 |
18 | 333669151420 |
19 | 2050493623760 |
20 | 7978700883230 |
21 | 49098707209695 |
22 | 191470222802880 |
23 | 1179633190545755 |
24 | 4608890486329844 |
25 | 28423658754983701 |
[1,4,24,90,541,2032,12275,46472,282003,1075404, 6549906,25125114,153481299,591529776,3622111560, 14013307170,85975792075,333669151420, 2050493623760,7978700883230,49098707209695, 191470222802880,1179633190545755,4608890486329844, 28423658754983701] |